The Roommate (2011)

Sara is a college design student new to Los Angeles, who shares an apartment with her wealthy roommate, Rebecca, who almost takes her under her wing. The two become close and initially get along well, but their bond changes when Sara expands her circle of friends and moves in with her new boyfriend. A series of disturbing events make clear the violent turn their relationship takes. Don't miss this engaging psychological thriller starring Leighton Meester and Minka Kelly, which was an unexpected hit.