Linda Cardellini Lindsay Weir Actor John Francis Daley Sam Weir Actor James Franco Daniel Desario Actor Samm Levine Neal Schweiber Actor Seth Rogen Ken Miller Actor Jason Segel Nick Andopolis Actor Martin Starr Bill Haverchuck Actor Becky Ann Baker Jean Weir Actor Joe Flaherty Harold Weir Actor Busy Philipps Kim Kelly Guest Star Dave Allen Dave Allen Guest Star Chauncey Leopardi Alan White Guest Star Sarah Hagan Millie Kentner Guest Star Stephen Lea Sheppard Harris Trinsky Guest Star Harriett S. Miller Mrs. Whitman Guest Star Judd Apatow Executive Producer Jake Kasdan Director Paul Feig Writer, Producer