John Francis Daley Sam Weir Actor Linda Cardellini Lindsay Weir Actor Samm Levine Neal Schweiber Actor Martin Starr Bill Haverchuck Actor James Franco Daniel Desario Actor Jason Segel Nick Andopolis Actor Seth Rogen Ken Miller Actor Joe Flaherty Harold Weir Actor Becky Ann Baker Jean Weir Actor Busy Philipps Kim Kelly Guest Star Leslie Mann Miss Foote Guest Star Dave Allen Jeff Rosso Guest Star Claudia Christian Gloria Haverchuck Guest Star Chauncey Leopardi Alan White Guest Star Doug Spinuzza Frank Guest Star Sarah Hagan Millie Kentner Guest Star Judd Apatow Executive Producer Jake Kasdan Director Paul Feig Writer, Producer