Hafthor Bjornsson is an Icelandic professional strongman and actor, best known for his role as Gregor Clegane, also known as "The Mountain," in the television series Game of Thrones. Born on November 26, 1988, he stands at 6 feet 9 inches tall and has competed in various strongman competitions, winning the prestigious World's Strongest Man title in 2018. In addition to his strongman career, Hafthor has pursued boxing, making his debut in 2021 against fellow strongman Eddie Hall. He has gained a significant following on social media, where he shares his training routines and lifestyle, inspiring many with his dedication to fitness and strength.