ENGLEFIELD, ENGLAND - DECEMBER 25: Prince William, Duke of Cambridge and Prince George of Cambridge attend a Christmas Day service at St. Marks Church on December 25, 2016 in Englefield, England. (Photo by Anwar Hussein/WireImage)
ENGLEFIELD, ENGLAND - DECEMBER 25: Prince William, Duke of Cambridge and Prince George of Cambridge attend a Christmas Day service at St. Marks Church on December 25, 2016 in Englefield, England. (Photo by Anwar Hussein/WireImage)