It’s no secret that Vampire Diaries star Nina Dobrev is super tight with bestie Julianne Hough and briefly dated Derek Hough this past fall, but did you know she hangs with the entire Hough family? Check out the oh-so-adorable Instagram holiday vid showing Nina as part of the fam!

Julianne and Derek are both Dancing With the Stars alums, but it is the latter who is currently engaged in an Instagram war with his DWTS partner, Maria Menounos. Maria started it all with one Thanksgiving video that escalated into a day-long dance war that has now spilled over into the Christmas season. On Christmas Eve, Derek posted this video teasing Nina’s involvement and the imminent Christmas day war.

In the vid, the Hough family is gathered around Derek, who is reading from a Hunger Games-themed book. “Twas the night before Christmas and all through the night, tomorrow is dance wars and we’re gonna fight, fight, fight!” Derek faux-reads.

Nina slowly (and creepily) stands up behind him, dressed in a Santa mask. She pulls it off, and asks pleasantly: “Hey, guys, what’s going on?”

“Nina Dobrev from Vampire Diaries? What?” Derek exclaims. Then, Nina puts on her best vamp expression (she has a lot of practice at this point), and scares the entire family away. They run screaming, setting the stage for the Christmas Dance War to come. And Nina’s addition to the crew. Derek captioned the vid: “May the odds be ever in your favor ...@mariamenounos78 #christmasdancewars.”

We love this particular Christmas tradition, and we love that Nina is a part of it!

What do you think of the Dance Wars tradition? Do you find Nina’s honorable spot in the Hough family as adorable as we do? Sound off in the comments below!

The Vampire Diaries returns Thursday, January 23 at 8 p.m. on The CW.

Kayti Burt is a contributing writer for Wetpaint Entertainment with a penchant for all things pop culture. Follow her on Twitter and Google+!