“Just sharing the sweetest Christmas Card from our President and Vice-President, The Duke and Duchess of Sussex. Very Merry Christmas, everyone!” the caption stated.
In the black and white snap, Harry and Meghan appear in the background, while little Archie crawls up to the camera and takes centre stage.
Fans were quick to share their admiration for the family snap.
“Archie got so big and he is so precious. What a beautiful Christmas card it is of the family. Love it,” said one royal fan.
Another added: “Thanks for sharing. It really is the sweetest Christmas card."
In other royal news, Buckingham Palace has taken to Twitter to reveal the details of this year’s Queen’s Speech.
However fans were quick to point out something unusual in the photo that accompanied the announcement.
Eagle-eyed observers noticed that the portrait of the Duke and Duchess of Sussex had been removed from their original place in the Queen's audience room in a picture taken from the Queen's private meeting with the High Commissioner for Grenada, Kisha Alexander-Grant.