Kenneth Lonergan Ron Director, Actor, Writer Laura Linney Sammy Prescott Actor Mark Ruffalo Terry Prescott Actor Rory Culkin Rudy Actor Matthew Broderick Brian Actor Jon Tenney Bob Actor J. Smith-Cameron Mabel Actor Gaby Hoffmann Sheila Actor Steve Carlis Executive Producer Donald C. Carter Executive Producer Barbara De Fina Producer Jill Footlick Line Producer John Hart Producer Larry Meistrich Producer Martin Scorsese Executive Producer Jeff Sharp Producer Morton Swinsky Executive Producer Lesley Barber Original Music Stephen Kazmierski Cinematographer Anne McCabe Film Editing Michael Shaw Production Design Melissa Toth Costume Design Michael Lerman First Assistant Director Barry Cole Music Supervisor Christopher Covert Music Supervisor Michael Taylor Script Supervisor Shawn Carroll Art Director Lydia Marks Set Decoration