The former spouses stood side-by-side as they posed together on Saturday night, and showed off their festive ensembles in a smiling snapshot, which Kourtney Kardashian shared in a blog post on her website on Thursday.
Caitlyn, 67, complemented her crimson gown with a while sweater, while Kris, 61, went with a more sheer gown and completed the outfit with a super plush black shawl.
Kourtney shared several photos from the family's traditional holiday bash, and opened up about why the annual celebration means so much to her.
"My mom and dad have thrown a Christmas Eve party ever since I was born," the 37-year-old reality star shared with her readers. "The party has definitely grown over the years: Santa Claus comes to visit, along with his reindeer, elves to decorate gingerbread houses and Christmas carolers. With Christmas being my favorite holiday, I look forward to the party all year!"
"It's really special to have loved the party as a child and now to be able to share it with my own children," continued Kourtney, who shares three children -- Mason, 7, Penelope, 4, and Reign, 2 -- with her ex, Scott Disick.