her door, saying that he wants to see her. Rebecca intercepts the note, and disguises herself as Sara. She then goes to Jason's hotel room and stabs him to death. Sara receives a text message from Irene saying she needs to meet with her right away, and she calls Stephen so he can meet her there. She arrives and finds a gagged Irene handcuffed to the bed. Rebecca reveals herself and points a gun at Sara, proclaiming her love and loyalty, before tearfully revealing she was responsible for what happened to Tracy, Cuddles, Professor Roberts, Irene, and Jason, and that she did it all to win Sara's friendship. Rebecca moves to smother Irene, and Sara attempts to stop her. Sara tries to call for help, but the phone is dead. Bound and helpless, Irene pleads for Sara to save herself. Sara tries to get out the window to get help. Rebecca breaks back into the room and aims the gun at the cuffed and helpless Irene, only to be stopped by Stephen who briefly disarms her but is knocked unconscious. Climbing back into the room, Sara is strangled by an enraged Rebecca. While choking, Sara stabs Rebecca with a box cutter, killing her after saying the words "You were never my friend". Sara moves back into her dorm and moves the extra bed out of her room with the help of Stephen, proclaiming that she does not want anyone as a roommate for a while. Cast Leighton Meester as Rebecca Evans Minka Kelly as Sara Matthews Cam Gigandet as Stephen Danneel Harris as Irene Crew Matt Lanter as Jason Tanner Nina Dobrev as Maria Aly Michalka as Tracy Long Kat Graham as Kim Johnson Cherilyn Wilson as Landi Rham Billy Zane as Professor Roberts Frances Fisher as Alison Evans Tomas Arana as Jeff Evans Alex Meraz as Frat boy Nathan Parsons as Cashier Boy Production Sonny Mallhi first thought of shooting the film in New York City but it was eventually shot on location at the University of Southern California in Los Angeles and at Loyola Marymount University. Leighton Meester was originally set to play Sara but was replaced by Minka Kelly and Leighton played Rebecca. Billy Zane and Frances Fisher had both starred together in Titanic fourteen years earlier, though in this film they shared no scenes. Reception Critical response On Rotten Tomatoes, the film holds an approval rating