In pictures: Britain's Queen Elizabeth II

This is a June 2, 1953 file photo of Britain's Queen Elizabeth II, seated on the throne, receives the fealty of the Archbishop of Canterbury, centre with back to camera, the Bishop of Durham, left and the Bishop of Bath and Wells, during her Coronation in Westminster Abbey. (AP)

This is a April 21, 1966  file photo of  Queen Elizabeth on the throne centre, in House of Lords during the opening of Parliament on the Queen's 40th birthday.  (PA. File via AP)

This is a June. 2, 1953 file photo of Britain's Queen Elizabeth II and Prince Philip, Duke of Edinburgh, as they wave to supporters from the balcony at Buckingham Palace, following her coronation at Westminster Abbey. London. (AP)

A young Princess Elizabeth and The Duke of Edinburgh walk in the grounds of Broadlands in southern England, the home of the Duke's uncle, Earl Mountbatten on their honeymoon, November 1947. Reuters

This is a May 15, 1954  file photo of  of Prince Charles and Princess Anne with their parents, Queen Elizabeth II and Duke of Edinburgh, on the balcony of Buckingham Palace following their return from the Commonwealth tour. (PA, File via AP)

This is a May 12, 1973  file photo of 12/05/73 of Queen Elizabeth II sitting with her corgis, at Virginia Water to watch competitors, including Prince Philip in the Marathon of the European Driving Championship, part of the Royal Windsor Horse Show. (PA, File via AP)

In this June 8, 1982 file photo, of U.S. President Ronald Reagan, on Centennial, and Britain's Queen Elizabeth II, on Burmese, as they go horseback riding on the grounds of Windsor Castle, England.  (AP)

This is a March 4, 1966   file photo of Britain's Queen Elizabeth II as she turns to smile and talk to an unidentified officer, during the Trooping of the Colour by the First Battalion of the Jamaica Regiment at Up-Park Camp, Kingston, Jamaica. The Queen and Prince are on a four-day visit to the island during the last lap of their five-week Caribbean tour. (AP)

This is a Feb. 15, 1952  file photo of Queen Elizabeth II s she shakes hands with the Dean of Windsor, the Rt. Rev. Eric Knightley Chetwode Hamilton, after the funeral service for her father, the late King George VI, at St. George's Chapel, Windsor.  (AP)

This is a June 5, 1961 file photo of Queen Elizabeth II and U.S. President John Kennedy as they pose at Buckingham Palace in London.  The Kennedy,s were dinner guests of the Queen. (AP)

This is a April 21, 1965  file photo of from left to right,  Queen Elizabeth II, baby Prince Edward, Princess Anne, Prince Andrew, Prince Charles and the Duke of Edinburgh, in the gardens of Frogmore House, Windsor, England, as they celebrate the Queen's 39th birthday. (PA File via AP)

This is a Oct. 14, 1986  file photo of  Britain's Queen Elizabeth II and Prince Philip at the Bedaling Pass, on the Great Wall of China, on the third day of their State Visit to China.  (Ron Bell/PA File, via AP)

This is a July 9, 1993   file photo of =of Queen Elizabeth II, with Chief Instructor, Small Arms Corp LT Col George Harvey, firing the last shot on a standard SA 80 rifle when she attended the centenary of the Army Rifle Association at Bisley, England. (Tim Ockenden/PA, File via AP)

This is a Dec. 21, 1984  file photo of from left to right, the Queen Mother, Queen Elizabeth II, Prince William, Prince Harry and the Prince and Princess of Wales after the christening ceremony of Prince Harry in London.  (PA, File via AP)

This is a Tuesday, Oct. 17, 2000 file photo of Britain's Queen Elizabeth II and Pope John Paul II as they meet at the Vatican.  (AP)

This is a July 27, 2000  file photo of of Queen Elizabeth II, left, and the Queen Mother leaving church by horse drawn carriage on the Sandringham Estate, Norfolk. (AP)

This is a Tuesday July 9 1996  file photo of South African President Nelson Mandela as he waves to crowds as he sits next to Queen Elizabeth II in a an open carriage on the way to Buckingham Palace at the start of his four day State visit to Britain.(AP

This photo made available on Tuesday Sept. 8, 2015, shows Britain's Queen Elizabeth II taken July 2015 and released by Buckingham Palace to mark the Queen becoming the longest reigning British monarch. The photograph, by Mary McCartney, shows The Queen seated at her desk in her private audience room at Buckingham Palace in London, with one of her official red boxes which she has received almost every day of her reign and contains important papers from government ministers in the United Kingdom and her Realms and from her representatives across the Commonwealth and beyond. (AP)

This is a Sunday, July 5, 2015  file photo of Britain's Queen Elizabeth II, third left, and from left, Prince Philip, Camilla the Duchess of Cornwall, Kate the Duchess of Cambridge holding Princess Charlotte, Prince George and Prince William aas thye leave after attending the Christening of Britain's Princess Charlotte at St. Mary Magdalene Church in Sandringham, England. (AP)

Reuters

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