Leighton Meester stars in The Roommate with Minka Kelly, opening this Friday.

If you were ever considering rooming with the Gossip Girl star in real life (we should be so lucky), there's one thing in particular she wants to make clear right off the bat.

As long as you abide by one simple request, things should work out really well between you. Watch her lay the ground rule down in this funny College Humor video ...

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.