Martin Starr is the stage name of Martin James Pflieger Schienle .
Martin Starr ( born Martin James Pflieger Schienle ; July 30 , 1982 ) is an American actor , known for his television roles as Bill Haverchuck on the short-lived NBC comedy-drama Freaks and Geeks and Roman DeBeers on the Starz comedy series Party Down , as well as for his film roles for Knocked Up , Cheats , and Adventureland.
Martin Starr