Kate's Together At Christmas concert will air at 7:30pm tonight, and viewers tuning in might be forgiven for thinking a festive truce had broken out with a familiar-looking face spotted in the crowd
When the service was filmed on December 6, Kate said that she had enlisted Prince Louis, six, to keep the performance by soloists from the Royal Ballet as a surprise for her daughter.
Kate, 42, had bravely persevered to host her fourth annual service after her toughest year yet, in which she underwent preventative chemotherapy for cancer.
Some royal superfans went so far as to camp overnight in Norfolk for a chance to catch a glimpse of the family at Sandringham when they take their walk to church
The Princess of Wales was a sight to behold alongside Prince William, their children Prince Louis, six, Princess Charlotte, nine, and Prince George, 11, as well as other members of the Royal Family
Laura Warshauer, who was placed in the same halls as Kate during their time at the University of St Andrews, delighted fans when she shared an unseen snap of the royal during her student days.
Liam died at age 31 on October 16 after falling from a third-floor balcony of a hotel in Buenos Aires, and Kate, 25, later revealed that she and the 'love of her life' were planning their future.