| Tyler Hoechlin | Joe Weider |
| Aneurin Barnard | Ben Weider |
| Julianne Hough | Betty Weider |
| Colton Haynes | Jack Lalanne |
| D.J. Qualls | Michael Steere |
| Victoria Justice | Kathy Weider |
| Max Martini | Jerry George |
| Tom Arnold | Roy Hawkins |
| Steve Guttenberg | Louis Weider |
| Calum VonMoger | Arnold Schwarzenegger |
| Kevin Durand | Bill Hauk |
| Robert Forster | Joe 2008 |
| Diane Sorrentino | Kate |
| Billy Reilich | Reg Park |
| Nadine Lewington | Anna Wieder |
| Jen Baker | Fan Girl |
| Jason Burkey | John Corbine |
| Nicole Weider | Becky |
| Jay Jablonski | Barton Horvath |
| Marco DelVecchio | Young Man |
Technical Credits
| George Gallo | Director,Screenwriter |
| Jeff Beal | Score Composer |
| Brent Caballero | Casting |
| Camila Castro | Executive Producer |
| Sophie Corra | Editor |
| Ellen Brown Furman | Screenwriter |
| Brad Furman | Screenwriter |
| Drew Gallagher | Co-producer |
| Tess Laeh Garcia | Makeup |
| James Grayford | Asst. Director |
| Steve Lee Jones | Producer |
| Scott LaStaiti | Producer |
| Stephen Lineweaver | Production Designer |
| Michael Negrin | Cinematographer |
| Melissa Vargas | Costumes/Costume Designer |
| Eric Weider | Executive Producer |
| Andy Weiss | Screenwriter |
