Queen Elizabeth II Presents The Insignia of A Knight of the Order of Australia To Prince Philip, Duke of Edinburgh [Getty Images]

WINDSOR, ENGLAND - APRIL 22: Queen Elizabeth II inspects the Insignia of a Knight of the Order of Australia after presenting it to Prince Philip, Duke of Edinburgh as the Australian High Commissioner Alexander Downer looks on in the white drawing room at Windsor Castle on April 22, 2015 in Windsor, England. (Photo by John Stillwell - WPA Pool/Getty Images)

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