Kensington Palace released the latest image on Friday, which was taken sometime in late October in London.
It's only the third official photo that's been shared with the public since Princess Charlotte's birth in early May.
Everyone is there... Will, Kate Middleton (aka the Duchess of Cambridge), 2-year-old Prince George, and seven-month-old Charlotte.
A statement that accompanied the image says that Will & Kate "are hugely appreciative of all the warm messages they have received about their family this year and are very much looking forward to their first Christmas as a family of four."
They won't be the only members of the Royal Family celebrating the holidays though.