George Gallo Director, Screenwriter Tyler Hoechlin Joe Weider Actor Aneurin Barnard Ben Weider Actor Julianne Hough Betty Weider Actor Victoria Justice Kathy Weider Actor Colton Haynes Jack Lalanne Actor Max Martini Jerry George Actor Tom Arnold Roy Hawkins Actor Steve Guttenberg Louis Weider Actor Calum Von Moger Arnold Schwarzenegger Actor DJ Qualls Michael Steere Actor Kevin Durand Bill Hauk Actor Robert Forster Joe 2008 Actor Andy Weiss Screenwriter Brad Furman Screenwriter Ellen Sue Brown Screenwriter Steve Lee Jones Producer, Casting Scott LaStaiti Producer Eric Weider Executive Producer Camila Castro Executive Producer Michael Negrin Cinematographer Sophie Corra Film Editing Jeff Beal Original Music Stephen J. Lineweaver Production Design Melissa Vargas Costume Design