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, Roman DeBeers on the Starz comedy series Party Down, and Bertram Gilfoyle in the HBO series Silicon Valley, as well as for his film roles in Knocked Up, Cheats, Adventureland, and Dead Snow: Red vs.