John Hamburg Director, Screenwriter, Producer Paul Rudd Peter Klaven Actor Jason Segel Sydney Fife Actor Rashida Jones Zooey Actor Jaime Pressly Denise Actor Andy Samberg Robbie Klaven Actor J.K. Simmons Oz Actor Jane Curtin Joyce Actor Jon Favreau Barry Actor Sarah Burns Hailey Actor Rob Huebel Tevin Downey Actor Joe Lo Truglio Lonnie Actor Lou Ferrigno Self Thomas Lennon Doug Actor Larry Levin Screenwriter Donald De Line Producer Bill Johnson Executive Producer Ivan Reitman Executive Producer Tom Pollock Executive Producer Jeffrey Clifford Executive Producer Andrew Haas Executive Producer Lawrence Sher Cinematographer William Kerr Film Editing Theodore Shapiro Original Music Andrew Laws Production Design Eric Sundahl Art Director Christopher Carlson Set Decoration Leesa Evans Costume Design