LONDON, UNITED KINGDOM - DECEMBER 20: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Prince William, Duke of Cambridge, Prince George of Cambridge, Catherine, Duchess of Cambridge and Prince Harry attend a Christmas lunch for members of the Royal Family hosted by Queen Elizabeth II at Buckingham Palace on December 20, 2016 in London, England. (Photo by Max Mumby/Indigo/Getty Images)
