Before he was the third actor to play Ser Gregor Clegane—"The Mountain That Rides"—on Game of Thrones, Hafþór "Thor" Júlíus Björnsson was already making heads explode with his performances in strongman competitions.
Björnsson, the second-strongest man alive, stands 6'9" tall and can bench press 500 pounds, squat 770 pounds and "raw" deadlift 925 pounds. In this video from the 2014 Arnold Strongman Classic, he handles an insane 994 pounds in the hummer-tire deadlift.
After placing second in this year's World's Strongest Man competition—losing by just half a point—Thor was tapped for the Mountain's most important scene despite never having acted before. He doesn't play football, either, but that didn't stop the Indianapolis Colts from considering drafting him.