Queen Elizabeth II April 21st 1926

Left File photo Princess Elizabeth of Great Britain 1951/10/16 on the right Queen Elizabeth II November 1, 2016.     (AP/Reuters)

(Left) Princess Elizabeth and The Duke of Edinburgh walking in the grounds of Broadlands in southern England, the home of the Duke's uncle, Earl Mountbatten on their honeymoon, November 1947. (Right) Britain's Queen Elizabeth and Prince Philip, the Duke of Edinburgh walk at Broadlands in Romsey, southern England in this undated photograph taken in 2007. (Reuters)

Queen Elizabeth, the Queen Mother of United Kingdom, with her husband King George VI, and their children Princess Elizabeth (later Elizabeth II) and Princess Margaret (AP)

King George VI, Princess Elizabeth, Princess Margaret, Queen Elizabeth of Great Britain (later Queen Mother) (l-r), following King's coronation, Britain. (AP)

Queen Elizabeth (later Queen Elizabeth the Queen Mother) with daughters, Princess Margaret (left), and Princess Elizabeth (AP)

Coronation of Queen Elizabeth II at Westminster Abbey, Britain. June 2nd 1953. (AP)

Queen Elizabeth II and Prince Philip tour of the old fort at Festival Park, Jamestown, Virginia. 1957/10/1 (AP)

Members of the British Royal Family sit for an official portrait in the white drawing room at Windsor Castle after Prince William's confirmation at St Georges Chapel March 9. Pictured are, (Left to Right Front Row) Prince Harry, Diana Princess of Wales, Prince William, the Prince of Wales, Queen Elizabeth, (back row Left to Right) King Constatine of Greece, Lady Susan Hussey, Princess Alexandra, the Duchess of Westminster, and Lord Romsey. (Reuters)

Britain's Queen Elizabeth II and Prince Philip, Prince Charles and the Duchess of Cornwall, left, Prince William and the Duchess of Cambridge arrive for the annual evening reception for members of the Diplomatic Corps at Buckingham Palace, London, Thursday Dec. 8, 2016. The Duchess of Cambridge wears the Cambridge Lover’s Knot Tiara, a favorite tiara of the late Princess Diana.   (AP)

Britain's Queen Elizabeth II and Prince Charles, taken in the White Drawing Room at Windsor Castle, England,  prior to the final night of The Queen's 90th Birthday Celebrations at the Royal Windsor Horse Pageant, to mark the end of the year of celebrations for The Queen's 90th birthday.<b> </b> (Reuters)

Britain's Queen Elizabeth II as she arrives by carriage on the first day of the Royal Ascot horse rac. (AP)

Britain's Queen Elizabeth and Prince Philip ride in a carriage during the Trooping The Colour parade at Buckingham Palace, in London. Buckingham Palace officials say Queen Elizabeth II and her husband Prince Philip have delayed their planned Christmas trip because both are suffering from heavy colds. (AP)

Britain's Queen Elizabeth rides a carriage with Colombia's President Juan Manuel Santos (obscured) as they depart his ceremonial welcome at Horse Guards Parade, in central London, Britain. (Reuters)

Britain's Queen Elizabeth walks through a field of ceramic poppies that form part of the art installation "Blood Swept Lands and Seas of Red", at the Tower of London in London. The evolving art installation, which will be completed on November 11, will create a commemoration for the centenary of World War One. (Reuters)

German Chancellor Angela Merkel and Britain's Queen Elizabeth smile as a robot waves during their visit at the Technical University of Berlin (TU Berlin) in Berlin, Germany. Queen Elizabeth and the Duke of Edinburgh are on a three day state visit to Germany.    (Reuters)

Britain's Queen Elizabeth and Prince Philip watch the sack race at the annual Braemar Highland Gathering in Braemar, Scotland, Britain. (Reuters)

Britain's Queen Elizabeth visits the new Asiatic lion enclosure at London Zoo, March 17, 2016. (Reuters)

Britain's Queen Elizabeth II is pictured through a gap in a floral exhibit by the New Covent Garden Flower Market, which features an image of the Queen, during a visit to the 2016 Chelsea Flower Show in central London May 23, 2016. (Reuters)

Britain's Queen Elizabeth leaves after the State Opening of Parliament, at the Palace of Westminster in London May 8, 2013. (Reuters)