Judd Apatow Director, Writer, Producer Seth Rogen Ben Stone Actor, Executive Producer Katherine Heigl Alison Scott Actor Paul Rudd Pete Actor Leslie Mann Debbie Actor Jay Baruchel Jay Actor Jonah Hill Jonah Actor Jason Segel Jason Actor Martin Starr Martin Actor Charlyne Yi Jodi Actor Iris Apatow Charlotte Actor Maude Apatow Sadie Actor Joanna Kerns Alison's Mom Actor Harold Ramis Ben's Dad Actor Alan Tudyk Jack Actor Kristen Wiig Jill Actor Bill Hader Brent Actor Ken Jeong Dr. Kuni Actor Loudon Wainwright Dr. Howard Actor, Original Music Tim Bagley Dr. Pellagrino Actor Mo Collins Female Doctor Actor B.J. Novak Young Doctor Actor Shauna Robertson Producer Clayton Townsend Producer Evan Goldberg Executive Producer Eric Alan Edwards Cinematographer Brent White Film Editing Craig Alpert Film Editing Joe Henry Original Music Jefferson Sage Production Design Lauren E. Polizzi Art Director Chris Spellman Set Decoration Debra McGuire Costume Design Allison Jones Casting