Mischa Barton is Homecoming Queen

Mischa Barton wears a pair of skeleton sweatpants on the Los Angeles set of her new movie Homecoming on Thursday.

In the film, Mischa, 22, plays jilted ex-girlfriend Shelby who has a plan in store for her former beau, who is coming back to his small town with a new lover. Homecoming also stars Matt Long (Jack McCallister from the short-lived WB series Jack & Bobby).