LONDON, UNITED KINGDOM - DECEMBER 16: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) 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 16, 2015 in London, England. (Photo by Max Mumby/Indigo/Getty Images)