The Iron Claw is officially out in theaters! Starring Zac Efron, Jeremy Allen White, Harris Dickinson, and Stanley Simons, the film tells the story of the Von Erich family. White plays Kerry Von Erich, the “Modern Day Warrior,” who became a beloved wrestling superstar worldwide before he died by suicide. To play the role, White had to fit the part, and with training and a lot of eating, he gained 40 pounds of muscle.The 32-year-old star had to live by a strict training regime and consume a lot of calories.