Argentina's government also expressed condolences.
”The government of the Argentine Republic expresses its sorrow for her passing and accompanies the British people and her family in this moment of grief," its foreign ministry posted on Twitter.
ReutersCopyright: Reuters
Mr Bolsonaro is fighting for re-election in a presidential vote next monthImage caption: Mr Bolsonaro is fighting for re-election in a presidential vote next month
'Her Majesty loved the Commonwealth, and it loved her'
Commonwealth Secretary General Baroness Scotland says the Queen was the epitome of "duty, stability, wisdom and grace" throughout her reign.
"Her Majesty loved the Commonwealth, and the Commonwealth loved her," she adds.
The statement highlighted a passage from the Bible: "Peace I leave with you; my peace I give you.
"I do not give to you as the world gives. Do not let your hearts be troubled and do not be afraid [John 14:27]."
The Commonwealth is a group of 56 countries - most, but not all, have historical links to the British Empire.
PA MediaCopyright: PA Media
Baroness Scotland and the Queen in 2018Image caption: Baroness Scotland and the Queen in 2018
Queen's relationship with armed forces deeply personal - UK defence chief
Getty ImagesCopyright: Getty Images
The head of the British armed forces has also expressed his condolences to King Charles III and the Royal Family.
Adm Sir Tony Radakin called the relationship between the Queen and the armed forces "deeply personal".
"Through her own service in the Second World War, and as the wife, mother and grandmother of service personnel, the Queen understood better than most the burdens and the glory of a life in uniform".
Adm Radakin added that sailors, soldiers and aviators will perform their final duty "to a much loved sovereign" in the coming days with "admiration and gratitude".
Asian leaders express 'deep sorrow'
Getty ImagesCopyright: Getty Images
The Queen greeting Singapore PM Lee at a meeting of Commonwealth leaders in London in 2018Image caption: The Queen greeting Singapore PM Lee at a meeting of Commonwealth leaders in London in 2018
As people across Asia wake up to the news of the Queen's passing, political leaders sent their condolences.
In Japan, Prime Minister Fumio Kishida expressed his "deep sorrow".
"The death of the Queen, who led Britain through turbulent times in the world, is a great loss not only for the British people but also the international community," he told reporters.
In Singapore - formerly ruled by the British and a member of the Commonwealth - Prime Minister Lee Hsien Loong wrote on Facebook the Queen's passing "is greatly mourned by everyone in Singapore."
"She performed her duties with devotion, grace and humility. Her contributions to the United Kingdom, the Commonwealth and indeed the world will be recorded in history."
This is a loss we feel deeply - Australia's PM
Video content
Video caption: Queen Elizabeth II: 'This is a loss we feel deeply in Australia,' PM Albanese saysQueen Elizabeth II: 'This is a loss we feel deeply in Australia,' PM Albanese says
In a video tribute, Anthony Albanese calls the Queen a "wise and encouraging guide" who brought "comfort, hope and solace for millions of Australians".
Indians mark Queen's long association with their country
Arunoday Mukharji
BBC News, Delhi
Getty ImagesCopyright: Getty Images
Queen Elizabeth II visits a community project near Jaipur in 1961Image caption: Queen Elizabeth II visits a community project near Jaipur in 1961
Indian Prime Narendra Modi recalled one special moment with the Queen when he sent his condolences. He remembered her showing him the handkerchief given to her by Mahatma Gandhi for her wedding.
The late hour in India did not stop grieving messages
from flooding social media. As newspapers got ready to print the headline that Indians will wake up to on Friday morning, digital portals
were abuzz with the Queen’s photographs and memories of her three past visits to
the country.
In 1961, the Queen became the first reigning British monarch to visit
India in 50 years. It’s from then that her association with the country began.
She came again in 1983 and her last visit was in 1997. There was a gap of
barely five years between India gaining independence and the Queen ascending
the throne.
The story of the rise of an independent India and the rise of the
Queen as the longest-serving British monarch will always be intertwined.
'Our hearts are broken': UK newspapers pay tribute in first editions
The UK's newspapers have published their first editions since the Queen's death. Here are a selection of their historic front pages:
BBCCopyright: BBC
The Times marks the moment with a striking photo of the Queen from her coronation in 1953, alongside the words: "A life in service." The paper's back page carries a quotation from her Christmas broadcast in 1957, the first to be televised: "I cannot lead you into battle. I do not give you laws or administer justice but I can do something else: I can give you my heart and my devotion to all these old islands, and to all the peoples of our brotherhood of nations."Image caption: The Times marks the moment with a striking photo of the Queen from her coronation in 1953, alongside the words: "A life in service." The paper's back page carries a quotation from her Christmas broadcast in 1957, the first to be televised: "I cannot lead you into battle. I do not give you laws or administer justice but I can do something else: I can give you my heart and my devotion to all these old islands, and to all the peoples of our brotherhood of nations."
BBCCopyright: BBC
"Our hearts are broken," says the Daily Mail with a portrait of the Queen from 1952, while she was Princess Elizabeth. "How to find the words?" the paper's columnist Sarah Vine asks. "Our grief is a hundred different emotions, all of them hard to grasp."Image caption: "Our hearts are broken," says the Daily Mail with a portrait of the Queen from 1952, while she was Princess Elizabeth. "How to find the words?" the paper's columnist Sarah Vine asks. "Our grief is a hundred different emotions, all of them hard to grasp."
BBCCopyright: BBC
The Daily Telegraph reprints the Queen's own message of condolence to the families of the victims of the 9/11 attacks: "Grief is the price we pay for love." US President Joe Biden referenced the comment in his tribute and recalled how she stood in solidary with the US in its "darkest days".Image caption: The Daily Telegraph reprints the Queen's own message of condolence to the families of the victims of the 9/11 attacks: "Grief is the price we pay for love." US President Joe Biden referenced the comment in his tribute and recalled how she stood in solidary with the US in its "darkest days".
The Dutch and Spanish royal families have paid their respects and spoken of their sadness at the death of Queen Elizabeth II.
Spain's King Felipe VI spoke of the Queen's sense of duty and commitment as being an example "for us all".
Quote Message: Her Majesty Queen Elizabeth has been without doubt a witness to, a writer of and privy to the majority of the most important chapters in the history of our world over the last seven decades.
Her Majesty Queen Elizabeth has been without doubt a witness to, a writer of and privy to the majority of the most important chapters in the history of our world over the last seven decades.
In a statement, the Dutch Royal House said it would remember the Queen with "deep respect and great affection".
Quote Message: We are very grateful for our countries' close friendship, to which Queen Elizabeth made such an unforgettable contribution. from King Willem-Alexander, Queen Maxima and Princess Beatrix Dutch Royal House
We are very grateful for our countries' close friendship, to which Queen Elizabeth made such an unforgettable contribution.
Getty ImagesCopyright: Getty Images
The Queen held a state banquet to mark the visit of King Willem-Alexander in 2018Image caption: The Queen held a state banquet to mark the visit of King Willem-Alexander in 2018
A queen in waiting: Elizabeth II's childhood years
The young Princess Elizabeth spent her childhood in the spotlight.
Video content
Video caption: A queen in waiting: Elizabeth II's childhood yearsA queen in waiting: Elizabeth II's childhood years
A strong memory I will have of her is laughter, says Ardern
POOLCopyright: POOL
It is with "great sadness" that New Zealand has woken to the news, the country's Prime Minister Jacinda Ardern has said. She herself had been woken from her sleep pre-dawn by her security detail, she added.
The Queen was the first British monarch to visit the southern Pacific nation, opening its parliament in 1953, and then returning nine more times.
"The last days of the Queen's life capture how she was in so many ways: working to the very end on the behalf of the people she loved," said Ardern, referring to the monarch appointing the new British prime minister on Tuesday.
Ardern said she defined notions of "service, charity and consistency" as well demonstrating courage and compassion over decades.
And lastly: "A strong memory I will have of her is laughter. She was extraordinary."
Flags will fly at half-mast across the country until after the Queen's funeral, and condolence books have been set up.
Britons abroad gather to mark Queen's death
PA MediaCopyright: PA Media
Thousands of miles away from home, Britons in southern California
have gathered in a traditional British pub to pay their respects to the royal.
Mourners have left candles and roses outside of Ye
Olde Kings Head in Santa Monica, remarking that they felt “homesick”
commemorating the Queen’s passing in the US state away from family and friends.
Lydia
Williams, 24, said it was “a strange feeling being away from home” while the
death was “such a big British moment for British people to feel together”.
Tatiana Ashborn, 19, an actress from the UK, added that receiving news of the monarch's death had been "devastating". "We both cried, we were both so sad," she said.
Elsewhere in Los Angeles, Bafta has cancelled its annual tea party in the city, saying it was "deeply saddened" by the news.
'Grandmother of the nation': British music stars join tributes
Musicians who performed for and were honoured by the Queen have been joining the tributes.
Sir Elton John said the monarch was "a huge part of my life from childhood to this day".
"She was an inspiring presence to be around," he wrote on social media, adding that she led the country "through some of our greatest, and darkest, moments with grace, decency and a genuine caring warmth".
Dame Shirley Bassey noted how the monarch "remained steadfast, dignified, inspirational".
"Her courage was mighty, her example iconic," she said.
Queen had special place in her heart for Australia - country's PM
Getty ImagesCopyright: Getty Images
The Queen and Prince Philip on a visit to Melbourne in 1954Image caption: The Queen and Prince Philip on a visit to Melbourne in 1954
Australia's Prime Minister Anthony Albanese has paid tribute to the Queen saying she was "a monarch who let her humanity show".
He reflected on the "sympathy and personal kindness" she extended to Australians who'd been afflicted by tragedy and disaster during her reign.
Albanese added, "From her famous first trip to Australia [in 1954], the only reigning sovereign to ever visit, it was clear Her Majesty held a special place in her heart for Australia".
He says his government and the people of Australia offer their deepest condolences to the Royal Family, adding "Australian hearts go out to the people of the United Kingdom".
Quote Message: This is a loss we all feel, for few have known a world without Queen Elizabeth II. In her seven remarkable decades on the throne, Her Majesty was a rare and reassuring constant amidst rapid change. Through the noise and tumult of the years, she embodied and exhibited a timeless decency and an enduring calm
This is a loss we all feel, for few have known a world without Queen Elizabeth II. In her seven remarkable decades on the throne, Her Majesty was a rare and reassuring constant amidst rapid change. Through the noise and tumult of the years, she embodied and exhibited a timeless decency and an enduring calm
Australia's parliament will be suspended for at least 15 days as the prime minister and governor-general travel to London, where they are expected to meet King Charles III and attend the Queen's funeral.
Putin expresses deepest condolences to King Charles III
Russian President Vladimir Putin has expressed his "deepest condolences" to King Charles III on the death of his mother, Tass news agency reports.
"For many decades, Elizabeth II rightfully enjoyed the
love and respect of her subjects,
as well as authority on the world stage," the Russian leader said.
Putin wished King Charles "courage and resilience in the face of this heavy, irreparable loss".
King Charles, among with other members of the Royal Family, expressed support for Ukraine following the Russian invasion earlier this year. "We are in solidarity with all those who are resisting brutal aggression," he said at the time.
Crowds sing national anthem outside Buckingham Palace
Video content
Video caption: Queen Elizabeth II: Crowds sing national anthem outside Buckingham PalaceQueen Elizabeth II: Crowds sing national anthem outside Buckingham Palace
In central London earlier, crowds gathered outside Buckingham Palace to pay their respects to Queen Elizabeth II.
People sporadically broke out into the national anthem and rounds of applause.
Many members of the public started leaving flowers at the gate of the palace before news of her death was announced. The British flag at the Palace was then lowered to half-mast and many others joined mourners at The Mall to pay homage to the longest-serving monarch in British history.
Commonwealth leaders pay tribute to Queen's dedication
James Landale
Diplomatic correspondent
As head of the Commonwealth throughout her reign, the Queen nurtured and shaped a unique international organisation whose leaders past and present relied on her wisdom and judgement.
There was gratitude from across the group of nations, and respect for a life of duty and service to an international body comprising more than two and a half billion people.
India's Prime Minister, Narendra Modi, said the Queen personified dignity and decency in public life.
In South Africa, President Cyril Ramaphosa said the Queen’s commitment and dedication was a noble and virtuous example to the entire world.
The president of Ghana, Nana Akufo-Addo, described the Queen as “the rock” that kept the Commonwealth “sturdy and true”, remembering her “elegance, style and the sheer joy she brought to the performance of her duties”.
The Queen stood up for what mattered - historian
Getty ImagesCopyright: Getty Images
Ghana's first post-indendence leader Kwame Nkrumah hosted the British monarch in 1961Image caption: Ghana's first post-indendence leader Kwame Nkrumah hosted the British monarch in 1961
She’s best known for her dedication to duty – but the Queen
wasn’t afraid of causing a stir either, says historian and author Robert Lacey.
In 1961, around the time of the breakup of Britain’s empire,
President Nkrumah of Ghana was “a very controversial figure” and the government
of the day didn’t want the Queen to visit, Lacey tells Newshour.
But the Queen went anyway - and was photographed dancing and
smiling with Nkrumah.
The images shocked people around the world, adds Lacey, as “this was the
age of apartheid, this is the age when in America 33 states still banned
interracial marriage… and here was this young Queen just un-self-consciously
standing up for what mattered".
The Duchess of York says she is heartbroken
Getty ImagesCopyright: Getty Images
The Duchess of York and her daughter Princess Beatrice enjoyed Ascot with the Queen in 2018Image caption: The Duchess of York and her daughter Princess Beatrice enjoyed Ascot with the Queen in 2018
The Duchess of York, the former wife of Prince Andrew, says she is heartbroken by the death of the Queen.
The duchess says Queen Elizabeth II will leave behind "an extraordinary legacy", adding that she was a fantastic example of duty, service and steadfastness.
And on a personal note, the duchess says the Queen had been "the most incredible" mother-in-law and friend.
Sarah Ferguson adds that she will always be grateful for the monarch's generosity and closeness "even after my divorce".
"I will miss her more than words can express."
Biden praises 'great lady' as he signs condolence book
Getty ImagesCopyright: Getty Images
US President Joe Biden has just visited the British embassy in Washington DC to pay tribute to Queen Elizabeth
and sign a book of condolences.
He and First Lady Jill
Biden were greeted as they arrived by the British ambassador, Dame Karen Pierce.
"We mourn for all of you. She was a great lady, I'm so
delighted I got to meet her," Biden told
the ambassador after signing the book.
"Our hearts are with you," the US first lady said.
The president thanked the staff and added: "As my mother would say, God love you."
The BBC’s Gary O’Donoghue, who was at the embassy, said the president spent a few minutes with embassy staff before he left, drawing several bursts of laughter from the crowd.
He told them of the time that he visited the Queen and she made him crumpets.
On American politics, he said in jest, that she had not so much as grilled him as directed him.
'She's the person we've always looked up to'
People in the historic town of Windsor, home to the Queen's main residence Windsor Castle, have been talking about what the Queen meant to them.
Video content
Video caption: 'She's the person we've always looked up to''She's the person we've always looked up to'
Live Reporting
Edited by Francesca Gillett
All times stated are UK

Getty ImagesCopyright: Getty Images 
Getty ImagesCopyright: Getty Images The Queen greeting Singapore PM Lee at a meeting of Commonwealth leaders in London in 2018Image caption: The Queen greeting Singapore PM Lee at a meeting of Commonwealth leaders in London in 2018 Video caption: Queen Elizabeth II: 'This is a loss we feel deeply in Australia,' PM Albanese saysQueen Elizabeth II: 'This is a loss we feel deeply in Australia,' PM Albanese says 
Getty ImagesCopyright: Getty Images Queen Elizabeth II visits a community project near Jaipur in 1961Image caption: Queen Elizabeth II visits a community project near Jaipur in 1961 
Getty ImagesCopyright: Getty Images The Queen held a state banquet to mark the visit of King Willem-Alexander in 2018Image caption: The Queen held a state banquet to mark the visit of King Willem-Alexander in 2018 Video caption: A queen in waiting: Elizabeth II's childhood yearsA queen in waiting: Elizabeth II's childhood years 
POOLCopyright: POOL 
PA MediaCopyright: PA Media 
Getty ImagesCopyright: Getty Images The Queen and Prince Philip on a visit to Melbourne in 1954Image caption: The Queen and Prince Philip on a visit to Melbourne in 1954 Video caption: Queen Elizabeth II: Crowds sing national anthem outside Buckingham PalaceQueen Elizabeth II: Crowds sing national anthem outside Buckingham Palace 

Getty ImagesCopyright: Getty Images Ghana's first post-indendence leader Kwame Nkrumah hosted the British monarch in 1961Image caption: Ghana's first post-indendence leader Kwame Nkrumah hosted the British monarch in 1961 
Getty ImagesCopyright: Getty Images The Duchess of York and her daughter Princess Beatrice enjoyed Ascot with the Queen in 2018Image caption: The Duchess of York and her daughter Princess Beatrice enjoyed Ascot with the Queen in 2018 
Getty ImagesCopyright: Getty Images Video caption: 'She's the person we've always looked up to''She's the person we've always looked up to'
Latest PostBrazil enters three days of mourning, Argentina pays tribute
Brazil's president has declared an official three-day mourning period after Queen Elizabeth II's death.
Jair Bolsanaro tweeted: "When life seems difficult, the brave don't lie down and accept defeat; instead, they are even more determined to fight for a better future - with these words, Queen Elizabeth II shows why she was not just the Queen of the British, but a queen to us all."
Argentina's government also expressed condolences.
”The government of the Argentine Republic expresses its sorrow for her passing and accompanies the British people and her family in this moment of grief," its foreign ministry posted on Twitter.
ReutersCopyright: Reuters Mr Bolsonaro is fighting for re-election in a presidential vote next monthImage caption: Mr Bolsonaro is fighting for re-election in a presidential vote next month
'Her Majesty loved the Commonwealth, and it loved her'
Commonwealth Secretary General Baroness Scotland says the Queen was the epitome of "duty, stability, wisdom and grace" throughout her reign.
"Her Majesty loved the Commonwealth, and the Commonwealth loved her," she adds.
The statement highlighted a passage from the Bible: "Peace I leave with you; my peace I give you.
"I do not give to you as the world gives. Do not let your hearts be troubled and do not be afraid [John 14:27]."
The Commonwealth is a group of 56 countries - most, but not all, have historical links to the British Empire.
PA MediaCopyright: PA Media Baroness Scotland and the Queen in 2018Image caption: Baroness Scotland and the Queen in 2018
Queen's relationship with armed forces deeply personal - UK defence chief
The head of the British armed forces has also expressed his condolences to King Charles III and the Royal Family.
Adm Sir Tony Radakin called the relationship between the Queen and the armed forces "deeply personal".
"Through her own service in the Second World War, and as the wife, mother and grandmother of service personnel, the Queen understood better than most the burdens and the glory of a life in uniform".
Adm Radakin added that sailors, soldiers and aviators will perform their final duty "to a much loved sovereign" in the coming days with "admiration and gratitude".
Asian leaders express 'deep sorrow'
As people across Asia wake up to the news of the Queen's passing, political leaders sent their condolences.
In Japan, Prime Minister Fumio Kishida expressed his "deep sorrow".
"The death of the Queen, who led Britain through turbulent times in the world, is a great loss not only for the British people but also the international community," he told reporters.
In Singapore - formerly ruled by the British and a member of the Commonwealth - Prime Minister Lee Hsien Loong wrote on Facebook the Queen's passing "is greatly mourned by everyone in Singapore."
"She performed her duties with devotion, grace and humility. Her contributions to the United Kingdom, the Commonwealth and indeed the world will be recorded in history."
This is a loss we feel deeply - Australia's PM
Video content
In a video tribute, Anthony Albanese calls the Queen a "wise and encouraging guide" who brought "comfort, hope and solace for millions of Australians".
Indians mark Queen's long association with their country
Arunoday Mukharji
BBC News, Delhi
Indian Prime Narendra Modi recalled one special moment with the Queen when he sent his condolences. He remembered her showing him the handkerchief given to her by Mahatma Gandhi for her wedding.
The late hour in India did not stop grieving messages from flooding social media. As newspapers got ready to print the headline that Indians will wake up to on Friday morning, digital portals were abuzz with the Queen’s photographs and memories of her three past visits to the country.
In 1961, the Queen became the first reigning British monarch to visit India in 50 years. It’s from then that her association with the country began.
She came again in 1983 and her last visit was in 1997. There was a gap of barely five years between India gaining independence and the Queen ascending the throne.
The story of the rise of an independent India and the rise of the Queen as the longest-serving British monarch will always be intertwined.
'Our hearts are broken': UK newspapers pay tribute in first editions
The UK's newspapers have published their first editions since the Queen's death. Here are a selection of their historic front pages:
BBCCopyright: BBC The Times marks the moment with a striking photo of the Queen from her coronation in 1953, alongside the words: "A life in service." The paper's back page carries a quotation from her Christmas broadcast in 1957, the first to be televised: "I cannot lead you into battle. I do not give you laws or administer justice but I can do something else: I can give you my heart and my devotion to all these old islands, and to all the peoples of our brotherhood of nations."Image caption: The Times marks the moment with a striking photo of the Queen from her coronation in 1953, alongside the words: "A life in service." The paper's back page carries a quotation from her Christmas broadcast in 1957, the first to be televised: "I cannot lead you into battle. I do not give you laws or administer justice but I can do something else: I can give you my heart and my devotion to all these old islands, and to all the peoples of our brotherhood of nations." 
BBCCopyright: BBC "Our hearts are broken," says the Daily Mail with a portrait of the Queen from 1952, while she was Princess Elizabeth. "How to find the words?" the paper's columnist Sarah Vine asks. "Our grief is a hundred different emotions, all of them hard to grasp."Image caption: "Our hearts are broken," says the Daily Mail with a portrait of the Queen from 1952, while she was Princess Elizabeth. "How to find the words?" the paper's columnist Sarah Vine asks. "Our grief is a hundred different emotions, all of them hard to grasp." 
BBCCopyright: BBC The Daily Telegraph reprints the Queen's own message of condolence to the families of the victims of the 9/11 attacks: "Grief is the price we pay for love." US President Joe Biden referenced the comment in his tribute and recalled how she stood in solidary with the US in its "darkest days".Image caption: The Daily Telegraph reprints the Queen's own message of condolence to the families of the victims of the 9/11 attacks: "Grief is the price we pay for love." US President Joe Biden referenced the comment in his tribute and recalled how she stood in solidary with the US in its "darkest days".
See all the day's front pages here.
Dutch and Spanish royal families send condolences
The Dutch and Spanish royal families have paid their respects and spoken of their sadness at the death of Queen Elizabeth II.
Spain's King Felipe VI spoke of the Queen's sense of duty and commitment as being an example "for us all".
In a statement, the Dutch Royal House said it would remember the Queen with "deep respect and great affection".
A queen in waiting: Elizabeth II's childhood years
The young Princess Elizabeth spent her childhood in the spotlight.
Video content
A strong memory I will have of her is laughter, says Ardern
It is with "great sadness" that New Zealand has woken to the news, the country's Prime Minister Jacinda Ardern has said. She herself had been woken from her sleep pre-dawn by her security detail, she added.
The Queen was the first British monarch to visit the southern Pacific nation, opening its parliament in 1953, and then returning nine more times.
"The last days of the Queen's life capture how she was in so many ways: working to the very end on the behalf of the people she loved," said Ardern, referring to the monarch appointing the new British prime minister on Tuesday.
Ardern said she defined notions of "service, charity and consistency" as well demonstrating courage and compassion over decades.
And lastly: "A strong memory I will have of her is laughter. She was extraordinary."
Flags will fly at half-mast across the country until after the Queen's funeral, and condolence books have been set up.
Britons abroad gather to mark Queen's death
Thousands of miles away from home, Britons in southern California have gathered in a traditional British pub to pay their respects to the royal.
Mourners have left candles and roses outside of Ye Olde Kings Head in Santa Monica, remarking that they felt “homesick” commemorating the Queen’s passing in the US state away from family and friends.
Lydia Williams, 24, said it was “a strange feeling being away from home” while the death was “such a big British moment for British people to feel together”.
Tatiana Ashborn, 19, an actress from the UK, added that receiving news of the monarch's death had been "devastating". "We both cried, we were both so sad," she said.
Elsewhere in Los Angeles, Bafta has cancelled its annual tea party in the city, saying it was "deeply saddened" by the news.
'Grandmother of the nation': British music stars join tributes
Musicians who performed for and were honoured by the Queen have been joining the tributes.
Sir Elton John said the monarch was "a huge part of my life from childhood to this day".
"She was an inspiring presence to be around," he wrote on social media, adding that she led the country "through some of our greatest, and darkest, moments with grace, decency and a genuine caring warmth".
Dame Shirley Bassey noted how the monarch "remained steadfast, dignified, inspirational".
"Her courage was mighty, her example iconic," she said.
Social embed from twitter
ReportReport this social embed, make a complaintSir Paul McCartney simply wrote: "God bless Queen Elizabeth II. May she rest in peace. Long live the King."
And Rolling Stones frontman Sir Mick Jagger remembered the Queen as the "much beloved grandmother of the nation". There are more tributes from stars here.
Queen had special place in her heart for Australia - country's PM
Australia's Prime Minister Anthony Albanese has paid tribute to the Queen saying she was "a monarch who let her humanity show".
He reflected on the "sympathy and personal kindness" she extended to Australians who'd been afflicted by tragedy and disaster during her reign.
Albanese added, "From her famous first trip to Australia [in 1954], the only reigning sovereign to ever visit, it was clear Her Majesty held a special place in her heart for Australia".
He says his government and the people of Australia offer their deepest condolences to the Royal Family, adding "Australian hearts go out to the people of the United Kingdom".
Australia's parliament will be suspended for at least 15 days as the prime minister and governor-general travel to London, where they are expected to meet King Charles III and attend the Queen's funeral.
Putin expresses deepest condolences to King Charles III
Russian President Vladimir Putin has expressed his "deepest condolences" to King Charles III on the death of his mother, Tass news agency reports.
"For many decades, Elizabeth II rightfully enjoyed the love and respect of her subjects, as well as authority on the world stage," the Russian leader said.
Putin wished King Charles "courage and resilience in the face of this heavy, irreparable loss".
King Charles, among with other members of the Royal Family, expressed support for Ukraine following the Russian invasion earlier this year. "We are in solidarity with all those who are resisting brutal aggression," he said at the time.
Crowds sing national anthem outside Buckingham Palace
Video content
In central London earlier, crowds gathered outside Buckingham Palace to pay their respects to Queen Elizabeth II.
People sporadically broke out into the national anthem and rounds of applause.
Many members of the public started leaving flowers at the gate of the palace before news of her death was announced. The British flag at the Palace was then lowered to half-mast and many others joined mourners at The Mall to pay homage to the longest-serving monarch in British history.
Commonwealth leaders pay tribute to Queen's dedication
James Landale
Diplomatic correspondent
As head of the Commonwealth throughout her reign, the Queen nurtured and shaped a unique international organisation whose leaders past and present relied on her wisdom and judgement.
There was gratitude from across the group of nations, and respect for a life of duty and service to an international body comprising more than two and a half billion people.
India's Prime Minister, Narendra Modi, said the Queen personified dignity and decency in public life.
In South Africa, President Cyril Ramaphosa said the Queen’s commitment and dedication was a noble and virtuous example to the entire world.
The president of Ghana, Nana Akufo-Addo, described the Queen as “the rock” that kept the Commonwealth “sturdy and true”, remembering her “elegance, style and the sheer joy she brought to the performance of her duties”.
The Queen stood up for what mattered - historian
She’s best known for her dedication to duty – but the Queen wasn’t afraid of causing a stir either, says historian and author Robert Lacey.
In 1961, around the time of the breakup of Britain’s empire, President Nkrumah of Ghana was “a very controversial figure” and the government of the day didn’t want the Queen to visit, Lacey tells Newshour.
But the Queen went anyway - and was photographed dancing and smiling with Nkrumah.
The images shocked people around the world, adds Lacey, as “this was the age of apartheid, this is the age when in America 33 states still banned interracial marriage… and here was this young Queen just un-self-consciously standing up for what mattered".
The Duchess of York says she is heartbroken
The Duchess of York, the former wife of Prince Andrew, says she is heartbroken by the death of the Queen.
The duchess says Queen Elizabeth II will leave behind "an extraordinary legacy", adding that she was a fantastic example of duty, service and steadfastness.
And on a personal note, the duchess says the Queen had been "the most incredible" mother-in-law and friend.
Sarah Ferguson adds that she will always be grateful for the monarch's generosity and closeness "even after my divorce".
"I will miss her more than words can express."
Biden praises 'great lady' as he signs condolence book
US President Joe Biden has just visited the British embassy in Washington DC to pay tribute to Queen Elizabeth and sign a book of condolences.
He and First Lady Jill Biden were greeted as they arrived by the British ambassador, Dame Karen Pierce.
"We mourn for all of you. She was a great lady, I'm so delighted I got to meet her," Biden told the ambassador after signing the book.
"Our hearts are with you," the US first lady said.
The president thanked the staff and added: "As my mother would say, God love you."
The BBC’s Gary O’Donoghue, who was at the embassy, said the president spent a few minutes with embassy staff before he left, drawing several bursts of laughter from the crowd.
He told them of the time that he visited the Queen and she made him crumpets.
On American politics, he said in jest, that she had not so much as grilled him as directed him.
'She's the person we've always looked up to'
People in the historic town of Windsor, home to the Queen's main residence Windsor Castle, have been talking about what the Queen meant to them.
Video content