Justin Theroux Director, Executive Producer Billy Crudup Henry Roth Actor Mandy Moore Lucy Reilly Actor Dianne Wiest Carol Actor Bob Balaban Arthur Patrick Actor Bobby Cannavale Don Meyers Actor Christine Taylor Allison Actor Peter Bogdanovich Roger Spade Actor Amy Sedaris Cassidy's Mom Actor Catherine Kellner Abusive Mom Actor Christopher Fitzgerald Robin Actor Jeremy Shamos Matthew Actor Martin Freeman Jeremy Actor Tom Wilkinson Rudy Holt Actor David Bromberg Writer, Producer Celine Rattray Producer Daniela Taplin Lundberg Producer Galt Niederhoffer Producer Chip Seelig Executive Producer Reagan Silber Executive Producer Luke Weinstock Executive Producer Steve Kazmierski Cinematographer Andy Keir Film Editing Ed Shearmur Original Music Teresa Mastropierro Production Design Niamh Byrne Set Decoration Heidi Bivens Costume Design