When Leighton Meester meets her new college roommate Minka Kelly in the upcoming horror film 'The Roommate,' she'll unwittingly join an illustrious list of obnoxious, irritating, malicious, deceiving, dysfunctional, psychotic and murderous roommates throughout cinematic history.

We all have our share of stories involving an iffy roommate. (For instance, I once lived with a woman who moved my things around daily and cleaned the apartment, windows closed, with heavy-duty ammonia.) Yet we hope, for your sake, none have been as bad as our list of the worst roommates in movies -- especially number one.