Prince George was pictured in the back of a car alongside his mother Kate, the Duchess of Cambridge, while uncle Prince Harry sat in the front passenger seat.
The two-year-old's father Prince William may be unable to attend the event because of work commitments as an air ambulance pilotvolunteerin the east of England.
The lunch is held every year so that members of the extended royal family who are not invited to the Queen's Sandringham estate for Christmas Day get to celebrate with the monarch.
William and Kate and their children - George and baby Charlotte - will also be spending Christmas on the Sandringham Estate in their own 10-bedroom Georgian mansion Anmer Hall.
The Duke and Duchess of Cambridge will attend the morning service with the royals at St. Mary Magdalene Church at Sandringham on Christmas Day before returning to Anmer Hall for Princess Charlotte's first Christmas with her maternal grandparents.
