In a file picture taken on September 5,1982 Britain's Queen Elizabeth II is accompanied by her son Prince Charles, Prince of Wales and Diana, Princess of Wales, during the Braemar games.

In this file picture taken on June 2, 1953 Queen Elizabeth II and the Prince Philip pose after the Queen's Coronation, in Buckingham Palace.

In this file picture taken on June 19, 2006 Britain's Queen Elizabeth II takes part in 'The Procession and Installation Service' of The Most Noble Order of the Garter at Windsor Castle, west of London.

In this file picture taken on November 15, 2006 Britain's Queen Elizabeth II reads her speech beside her page boys in The House of Lords during the State Opening of Parliament in London.

Queen Elizabeth II posing for a photograph with young Prince Charles and Princess Anne, taken in an unknown location.

In this file picture taken on April 4, 1955 Britain's Prime Minister Winston Churchill kisses Queen Elizabeth II's hand as she leaves 10 Downing Street in London, after a dinner given by the Prime Minister.

In this file picture taken on July 9, 1993 Queen Elizabeth II fires, under supervision of Lt Col George Harvey, during the Army Rifle Association meeting in Bisley.

Britain's Queen Elizabeth and her daughter Princess Anne, Princess Royal attend an event in Jubilee Wood on the Sandringham Estate in Norfolk to plant a tree to mark her diamond jubliee.

French President Jacques Chirac blow kisses to the crowds as he and Britain's Queen Elizabeth II ride in an open carriage to Buckingham Palace in London at the start of his state visit to Britain.

In a file picture taken on October 15, 1969 Britain's Queen Elizabeth II (L) arrives at King's Cross railway station in London with her four corgi dogs after holidays in Balmoral Castle in Scotland.

In a file picture taken on May 25, 2011 US President Barack Obama looks on as Britain's Queen Elizabeth II signs a guest book after a reciprocal dinner at the Winfield House in London.

Queen has seen 12 different British prime ministers from Churchill through to David Cameron. Many have attested to her level-headed wisdom and thorough grasp of affairs.

An undated file picture shows Britain's Queen Elizabeth II riding a horse in an unknown location. She is an avid follower of horse racing and famously a lover of Corgi dogs, which she keeps as pets.

In a file picture taken on July 17, 1976 and received on December 27, 2006 from the Gerald R. Ford Library shows President Ford and Britain's Queen Elizabeth II dancing during the state dinner in honor of the Queen and Prince Philip, Duke of Edinburgh, at the White House in Washington, DC.

In an undated file picture Britain's Queen Elizabeth II and her husband Prince Philip, Duke of Edinburgh walk with their children, Prince Charles, Prince of Wales and Princess Anne.

A file picture taken in 1953 shows an official portrait of Britain's Queen Elizabeth II taken in an unknown location.

In a file picture taken on September 8, 1960 Britain's Queen Elizabeth II, Prince Philip sit at Balmoral with their children Princess Anne, Prince Charles and the new-born Prince Andrew playing with a corgi.

In a file picture taken on December 7, 2009 Britain's Queen Elizabeth II meets US singer Lady Gaga following the Royal Variety Performance in Blackpool, England.

A file picture taken on December 10, 2009 shows Queen Elizabeth II posing prior to the recording of her annual Christmas Day broadcast to the Commonwealth in the White Drawing Room at Buckingham Palace.

In a file picture taken on November 10, 2011 Britain's Queen Elizabeth looks on as she opens an exhibition entitled ‘Royal Manuscripts: the Genius of Illumination’ at the British Library in London.