According to several national royal correspondents, Meghan will walk alongside the Queen, Prince William and wife Kate, and a number of other members of the family as they attend St Mary Magdalene Church for their annual Christmas Day service.
'You can expect to see the Duke and Duchess of Cambridge and Prince Harry and Ms Markle on Christmas Day,' the representative is said to have revealed.
The Duke and Duchess of Cambridge spent Christmas with the Middletons last year
The news means that Meghan will be making history as the first royal fiancée to spend the big day with the family. Although Prince William and Kate announced their engagement in October 2010, Kate didn't start attending Christmases with her other half's family until the pair were officially married in 2011.
Kate has previously spoken of her nervousness about what to get William's grandmother the Queen for the initial occasion, revealing that she ended up plumping for a jar of homemade chutney.
Speaking during the ITV documentary The Queen at 90, which was made to celebrate the monarch's milestone birthday last year, Kate said of the gift: 'I noticed the next day that it was on the table. Such a simple gesture went such a long way for me.'
It's not yet been said whether or not Prince George and Princess Charlotte will be joining their parents at St Mary Magdalene Church on Christmas Day, although it's likely they will be staying at Sandringham for the festive season.
It's thought that William and Kate, who are currently expecting their third child, have an agreement where they celebrate alternating Christmases with the Middletons and the Windsors.
As they were pictured at the Middleton's local church in Bucklebury last year, 2017 could be Prince Charles' turn to spend the day with his grandchildren.