The inspirational tale of the grandfathers of the fitness movement as we now know it, Joe & Ben Weider. Battling anti-Semitism, racism and extreme poverty, the brothers beat all odds to build an empire & inspire future generations.
| Actor | Role |
|---|---|
 Tyler HoechlinJoe Weider | Joe Weider |
 Aneurin BarnardBen Weider | Ben Weider |
 Colton HaynesJack Lalanne | Jack Lalanne |
 Julianne HoughBetty Weider | Betty Weider |
 DJ QuallsMichael Steere | Michael Steere |
 Victoria JusticeKathy Weider | Kathy Weider |
 Kevin DurandBill Hauk | Bill Hauk |
 Steve GuttenbergLouis Weider | Louis Weider |
 Max MartiniJerry George | Jerry George |
 Robert ForsterJoe Weider (2008) | Joe Weider (2008) |
 Tom ArnoldRoy Hawkins | Roy Hawkins |
 Calum Von MogerArnold Schwarzenegger | Arnold Schwarzenegger |
| JJared MotylSteve Reeves | Steve Reeves |
 Nicole WeiderBecky | Becky |
| DDiane SorrentinoKate | Kate |
 Christian FinlaysonYoung Joe Weider | Young Joe Weider |
| MMiles EmmonsBen Weider (age 7-9) | Ben Weider (age 7-9) |
 Nadine LewingtonAnna Weider | Anna Weider |
 Sterling HurstIvan Towne | Ivan Towne |
 Jason BurkeyJohn Corbine | John Corbine |
 Brian BrightmanHarry Crowne | Harry Crowne |
| HHunter ClowdusFitness Guy | Fitness Guy |
 Braxton QuinneyCarnival Kid | Carnival Kid |