Zara Phillips and Prince William with their grandmother, The Queen at Sandringham. (Photo by Georges De Keerle/Getty Images)
UNITED KINGDOM - JUNE 14: The Queen With Prince William And Prince Harry In The Royal Box At Guards Polo Club, Smiths Lawn, Windsor (Photo by Tim Graham Photo Library via Getty Images)
BALMORAL, UNITED KINGDOM - AUGUST 30: The Queen, Prince Philip, Prince Andrew And Princess Beatrice And Princess Eugenie Travelling To Sunday Service At Crathie Church, Balmoral (Photo by Tim Graham Photo Library via Getty Images)
LONDON, ENGLAND - NOVEMBER 18: HM Queen Elizabeth II and HRH Prince Philip, Duke of Edinburgh are joined by members of the Royal Family for a dinner in Clarence House hosted by HRH The Prince of Wales and HRH The Duchess of Cornwall, on Sunday November 18, 2007 in London, England. . The dinner party is in celebration of the forthcoming Diamond Wedding Anniversary of the Queen and The Duke. (Photo by Tim Graham/Getty Images)
KING'S LYNN, ENGLAND - JULY 05: Prince George of Cambridge talks to Queen Elizabeth II outside the Church of St Mary Magdalene on the Sandringham Estate for the Christening of Princess Charlotte of Cambridge on July 5, 2015 in King's Lynn, England. (Photo by Chris Jackson/Getty Images)
