Ben Stiller Invites You to His Party in the Back

10/16/2008 3:40 PM PDT
Ben Stiller is in dangerous territory -- and TMZ's very own in-house redneck says he's six day's growth away from a full-fledged mullet.

(Hey y'all, quick reminder -- when calculating mulletude, don't forget to factor in the ratio of back length to front length. Common mistake.)