'Game of Thrones' Actor and Weightlifter Says He's Done Steroids Hafthor Julius Bjornsson can be seen as Gregor Clegane <br />or "The Mountain" on the smash-hit HBO show. He is also the reigning champion in the World's Strongest Man competition, technically making him the <br />"strongest man on earth." In a newly released interview from <br />2017, Bjornsson says he has taken <br />performance-enhancing drugs to <br />help him compete. Hafthor Julius Bjornsson, via ESPN The 30-year-old declined to say if he still uses them or how often he's taken steroids. Steroids are prohibited in the strongman competitions, <br />but they have still been connected to the sport. Bjornsson himself claims he's never failed a drug test during required times of administration. The 6"9 Icelandic native, who weighs <br />440 pounds, has played Clegane since season 4 of 'Game of Thrones' This June, he plans to defend his title at the <br />World's Strongest Man competition in Florida.
