18 Movie Stalkers You Should Not F*ck With

Rebecca (Leighton Meester) just wants a best friend. Instead, she gets way too close to her college roommate, Sara (Minka Kelly). At first she just seems clingy, but Sara soon realizes that she's not just needy, she's potentially insane. Rebecca attacks another student trying to protect Sara, tattoos her name on her breast, and kills her cat by putting in it a dryer.