Future King and Queen George, Duke (1895–1952) and Elizabeth Angela, Duchess of York (1900–2002), with future Queen, Princess Elizabeth. (Photo by Hulton Archive/Getty Images). Circa 1929

Future King and Queen, George, Duke of York and Elizabeth, Duchess of York with their daughters, Princesses Elizabeth and Margaret Rose (1930–2002) of York watching a parade of Boy Scouts at Windsor Castle, Berkshire. (Photo by Central Press/Getty Images). 1932

Princess Elizabeth playing with a doll in a toy pram outside the Welsh House, a miniature house presented to Princess Elizabeth and Princess Margaret by the people of Wales in the grounds of the Royal Lodge, Windsor. (Photo by Central Press/Getty Images). Circa 1933

Princess Elizabeth hugging a corgi dog. (Photo by Lisa Sheridan/Studio Lisa/Getty Images). July 1936

King George and Queen Elizabeth with Princesses Elizabeth (centre) and Margaret and members of the extended Royal Family in full Coronation regalia on the balcony of Buckingham Palace after their Coronation ceremony. (Photo by Central Press/Getty Images). 12th May 1937

Queen Elizabeth talking to Lord Elphinstone during an inspection of the Royal Company of Archers at the Palace of Holyroodhouse, Edinburgh. Her husband King George VI is on the right; Princesses Elizabeth and Margaret Rose are in the centre. (Photo by Fox Photos/Getty Images). 1937

Princesses Elizabeth and Margaret, photographed with the penguins at London Zoo. (Photo by Hulton Archive/Getty Images). Circa 1938

Princess Elizabeth with a pony in Windsor Great Park, Berkshire. (Photo by Central Press/Getty Images). 21st April 1939

King George VI relaxes with his wife, the Queen Consort Elizabeth, and his children, Princesses Elizabeth and Margaret at the Royal Lodge, Windsor. (Photo by Lisa Sheridan/Studio Lisa/Getty Images). 11th April 1942

Queen Elizabeth II (as Princess Elizabeth) writing at her desk in Windsor Castle, Berkshire. (Photo by Lisa Sheridan/Studio Lisa/Getty Images). 30th May 1944

Princess Elizabeth rides out from Buckingham Palace, London to the Horse Guards' Parade, wearing a new military hat bearing the insignia of the Grenadier Guards. (Photo by Central Press/Getty Images). 12th June 1947

Queen Elizabeth II riding a horse side saddle and saluting during a Trooping of the Colour ceremony at Horse Guard's Parade, Central London. (Photo by William Vanderson/Fox Photos/Getty Images). 7th June 1952

Queen Elizabeth II on the way to Westminster to preside at the first State Opening of Parliament ceremony since her accession to the throne. (Photo by Central Press/Getty Images). 4th November 1952

Queen Elizabeth II wearing the State Crown and carrying the State orb in a Royal carriage after her Coronation ceremony. (Photo by Picture Post/Hulton Archive/Getty Images). 2nd June 1953

A regally adorned Queen Elizabeth II arriving at the Royal Performance of the film “To Catch A Thief” at the Odeon Cinema, Leicester Square. (Photo by Monty Fresco/Topical Press Agency/Getty Images). 31st October 1955

Queen Elizabeth II and the Duke of Edinburgh near the George IV Gateway, Windsor Castle. (Photo by Central Press/Getty Images). 6th June 1959

Queen Elizabeth II and Prince Philip, Duke of Edinburgh with their children, Prince Andrew (centre), Princess Anne (left) and Charles, Prince of Wales sitting on a picnic rug outside Balmoral Castle in Scotland. Queen Victoria's husband, Prince Albert, purchased Balmoral Castle in 1846, and the small castle which stood in the 7,000 hectare wooded estate was redeveloped in the 1850s.The granite building was designed by Aberdeen architect William Smith with suggestions from Albert himself, who decided the interior decoration should represent a Highland shooting box with tartan or thistle chintzes, and walls decorated with trophies and weapons. Queen Victoria often visited the Highlands with her family, especially after Albertfs death in 1861, and Balmoral is still a popular retreat for the present royal family. (Photo by Keystone/Getty Images). 9th September 1960

Queen Elizabeth II walking cross country at the North of Scotland Gun Dog Association Open Stake Retreiver Trials in the grounds of Balmoral Castle. (Photo by Central Press/Getty Images). 6th October 1967

Queen Elizabeth II applauds enthusiastically as her husband, Prince Philip, the Duke of Edinburgh, tackles the obstacle course for coaches at the Royal Windsor Horse Show. (Photo by Keystone/Getty Images). 9th May 1985

HRH Queen Elizabeth II peers around the side of her carriage as she leaves Parliament on November 26, 2003 in London. (Photo by Ian Waldie/Getty Images)

HRH Queen Elizabeth II Britain's poses at Howe Barracks in Canterbury, Kent with the 1st Battalion of The Argyll and Sutherland Highlanders with the Wilkinson Sword of Peace for establishing good relations with communities during their service in Iraq, 9 November 2004 in Kent, England. (Photo by ROTA/Getty Images)