While making a pouty face at the camera, Thorne dons a sexy Santa outfit, complete with hat, stockings and red high heels.
"Am I allowed to dress up year round?" she captioned the image.
Thorne has found herself in the headlines quite a lot this year.
In addition to launching a brand new TV show, the Freeform original series Famous in Love, she's been linked to a few different new beaus — the most notable of which is Scott Disick.
The 33-year-old Disick and 19-year-old Thorne were seen enjoying each other's company at a West Hollywood restaurant before reportedly hitting up evening hot spots The Nice Guy and The Peppermint Club.
They were also reportedly seen together being chauffeured off in the back of his car at the end of the night.
Thorne took some Snapchat videos while they were at Catch, but Disick was not visible in any of them.
The two then appeared around the Cannes Film Festival together, but things took a turn from there.
Reportedly, after spending time with Thorne, Disick was seen getting close with an ex, in addition to two other women.
This left Thorne feeling "used" and frustrated. The couple reportedly split but lately have been said to be an item again.