Queen Elizabeth is the longest-reigning monarch in British history. Look back at moments from her life so far.
Queen Elizabeth is the longest-reigning monarch in British history. Look back at moments from her life so far.
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Princess Elizabeth is seen in the Duchess' box during a pantomime act at London's Lyceum Theater in February 1935.
Princess Elizabeth is seen in the Duchess' box during a pantomime act at London's Lyceum Theater in February 1935.
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From left, Princess Elizabeth, King George VI, Queen Elizabeth and Princess Margaret wave to the crowd from the Royal Balcony of Buckingham Palace on June 22, 1939.
From left, Princess Elizabeth, King George VI, Queen Elizabeth and Princess Margaret wave to the crowd from the Royal Balcony of Buckingham Palace on June 22, 1939.
AP
A 14-year-old Princess Elizabeth, right, sits next to her sister for a radio broadcast on October 13, 1940. On the broadcast, her first, she said that England's children were full of cheerfulness and courage.
A 14-year-old Princess Elizabeth, right, sits next to her sister for a radio broadcast on October 13, 1940. On the broadcast, her first, she said that England's children were full of cheerfulness and courage.
AP
Princess Elizabeth, right, and Princess Margaret wear summer dresses circa 1942.
Princess Elizabeth, right, and Princess Margaret wear summer dresses circa 1942.
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This portrait of the British royal family was taken in July 1947, after Princess Elizabeth, far left, got engaged to Prince Philip of Greece, a lieutenant in the British Navy. He is second from left. To his left are Queen Elizabeth, King George VI and Princess Margaret.
This portrait of the British royal family was taken in July 1947, after Princess Elizabeth, far left, got engaged to Prince Philip of Greece, a lieutenant in the British Navy. He is second from left. To his left are Queen Elizabeth, King George VI and Princess Margaret.
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The Royal Wedding Party waves from the balcony of Buckingham Palace on November 20, 1947. After becoming a British citizen and renouncing his Greek title, Philip became His Royal Highness Prince Philip, Duke of Edinburgh. His wife became the Duchess of Edinburgh.
The Royal Wedding Party waves from the balcony of Buckingham Palace on November 20, 1947. After becoming a British citizen and renouncing his Greek title, Philip became His Royal Highness Prince Philip, Duke of Edinburgh. His wife became the Duchess of Edinburgh.
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Princess Elizabeth smiles in March 1950 as she arrives to a state banquet at the French Embassy in London's Kensington Palace Gardens.
Princess Elizabeth smiles in March 1950 as she arrives to a state banquet at the French Embassy in London's Kensington Palace Gardens.
AP
Queen Elizabeth II walks to the altar during her coronation ceremony on June 2, 1953.
Queen Elizabeth II walks to the altar during her coronation ceremony on June 2, 1953.
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From the Royal Collection -- The Queen sits for a photograph with a young Prince Charles and a very blonde Princess Anne.
From the Royal Collection -- The Queen sits for a photograph with a young Prince Charles and a very blonde Princess Anne.
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Queen Elizabeth II with her oldest son, Prince Charles, in 1969.
Queen Elizabeth II with her oldest son, Prince Charles, in 1969.
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Prince Charles adjusts his coronet during his investiture ceremony as Prince of Wales in 1969.
Prince Charles adjusts his coronet during his investiture ceremony as Prince of Wales in 1969.
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Queen Elizabeth II and Prince Philip wave from a plane ramp shortly before taking off from Tokyo in May 1975.
Queen Elizabeth II and Prince Philip wave from a plane ramp shortly before taking off from Tokyo in May 1975.
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The Queen meets the crowds during her royal tour of New Zealand in 1977.
The Queen meets the crowds during her royal tour of New Zealand in 1977.
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The Queen stands next to Prince Charles as he kisses his new bride, Princess Diana, on their wedding day July 29, 1981.
The Queen stands next to Prince Charles as he kisses his new bride, Princess Diana, on their wedding day July 29, 1981.
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Queen Elizabeth II takes pictures of her husband during a horse show in Windsor, England, on May 16, 1982.
Queen Elizabeth II takes pictures of her husband during a horse show in Windsor, England, on May 16, 1982.
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The Queen reacts to an elephant as she tours a charity event in London's Hyde Park in June 1987.
The Queen reacts to an elephant as she tours a charity event in London's Hyde Park in June 1987.
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Queen Elizabeth II fires a rifle during a visit to the Army Rifle Association at Bisley, England, in July 1993.
Queen Elizabeth II fires a rifle during a visit to the Army Rifle Association at Bisley, England, in July 1993.
AP
While at Buckingham Palace, Queen Elizabeth II and Prince Philip view the floral tributes to Princess Diana after her tragic death in 1997.
While at Buckingham Palace, Queen Elizabeth II and Prince Philip view the floral tributes to Princess Diana after her tragic death in 1997.
AP
The Queen addresses the nation on the night before Princess Diana's funeral in 1997.
The Queen addresses the nation on the night before Princess Diana's funeral in 1997.
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Prince Charles looks back at his mother after wedding Camilla, Duchess of Cornwall, in April 2005.
Prince Charles looks back at his mother after wedding Camilla, Duchess of Cornwall, in April 2005.
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Queen Elizabeth II and Prince Philip leave London's St. Paul's Cathedral on October 9, 2009, following a commemoration service to mark the end of combat operations in Iraq.
Queen Elizabeth II and Prince Philip leave London's St. Paul's Cathedral on October 9, 2009, following a commemoration service to mark the end of combat operations in Iraq.
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The Queen, second from right, greets a crowd from the balcony of Buckingham Palace on April 29, 2011. Her grandson Prince William, third from left, had just married Catherine Middleton.
The Queen, second from right, greets a crowd from the balcony of Buckingham Palace on April 29, 2011. Her grandson Prince William, third from left, had just married Catherine Middleton.
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Queen Elizabeth II drives her Range Rover as she attends the Windsor Horse Show in May 2011.
Queen Elizabeth II drives her Range Rover as she attends the Windsor Horse Show in May 2011.
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The Queen's signature is seen in the visitors book at Aras An Uachtarain, the Irish President's official residence in Dublin, Ireland, in May 2011.
The Queen's signature is seen in the visitors book at Aras An Uachtarain, the Irish President's official residence in Dublin, Ireland, in May 2011.
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Flags are waved as Queen Elizabeth II leaves St. Paul's Cathedral following its 300th anniversary service in June 2011.
Flags are waved as Queen Elizabeth II leaves St. Paul's Cathedral following its 300th anniversary service in June 2011.
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Madame Tussauds London reveals a wax figure of the Queen in May 2012.
Madame Tussauds London reveals a wax figure of the Queen in May 2012.
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Prince Charles kisses his mother's hand on stage as singer Paul McCartney, far right, looks on at the Diamond Jubilee concert held June 4, 2012, at Buckingham Palace. The Diamond Jubilee celebrations marked Elizabeth's 60th anniversary as Queen.
Prince Charles kisses his mother's hand on stage as singer Paul McCartney, far right, looks on at the Diamond Jubilee concert held June 4, 2012, at Buckingham Palace. The Diamond Jubilee celebrations marked Elizabeth's 60th anniversary as Queen.
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The Queen speaks at a reception for members of the International Olympic Committee on July 23, 2012.
The Queen speaks at a reception for members of the International Olympic Committee on July 23, 2012.
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The Queen tours the Foreign and Commonwealth Office in London in December 2012.
The Queen tours the Foreign and Commonwealth Office in London in December 2012.
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The Queen waits to give her speech during the State Opening of Parliament on May 27, 2015.
The Queen waits to give her speech during the State Opening of Parliament on May 27, 2015.
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The Queen sits at a desk in Buckingham Palace in July 2015.
The Queen sits at a desk in Buckingham Palace in July 2015.
Mary McCartney
Queen Elizabeth II acknowledges the crowd as she celebrates her 90th birthday in Windsor, England, on April 21, 2016.
Queen Elizabeth II acknowledges the crowd as she celebrates her 90th birthday in Windsor, England, on April 21, 2016.
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On June 10, 2016, Buckingham Palace released a new official photograph to mark the Queen's 90th birthday. It shows her with Prince Philip and was taken at Windsor Castle just after Easter.
On June 10, 2016, Buckingham Palace released a new official photograph to mark the Queen's 90th birthday. It shows her with Prince Philip and was taken at Windsor Castle just after Easter.
Annie Leibovitz/2016 Annie Leibovitz/Press Association Images