TMZ to Ron Livingston: And You Are ... ???

He starred in "Office Space" and broke up with Carrie Bradshaw via Post-It, but one TMZ photog had no idea who the heck Ron Livingston was outside a celebrity poker tournament.


Unbelievably, the shooter actually asked Ron who he was, right to his face. We're going to need you to go ahead and ... yeah ... just tell us who you are ...