Before wishing the public "a very Merry Christmas," Kate revealed what her carol service is all about: "A reminder that at Christmas, and throughout the year, we must all shine for each other. Because in times of joy and sadness, we are all each other's light."

Catherine, Princess of Wales, penned a touching letter ahead of her annual Christmas carol service at Westminster Abbey. On social media, the official Instagram for Prince William and the former Kate Middleton shared a preview of a “special letter ...