Hafþór Júlíus Björnsson

Hafþór Júlíus Björnsson (Icelandic: [ˈhafθour ˈjuːlijʏs ˈpjœr̥sɔn] ; transliterated as Hafthor Julius Bjornsson in English; born 26 November 1988) is an Icelandic professional strongman. With 32 international titles, 60 total wins, 87 podiums and 130 world records which makes him the most prolific record breaker in the history of strength sports, he is widely regarded as one of the greatest and most decorated strength athletes of all-time.

The winner of the World's Strongest Man, the World's Ultimate Strongman, two times the World's Strongest Viking, three times the Arnold Strongman Classic, five times the Europe's Strongest Man, nine Strongman Champions League wins, ten Giants Live wins and twelve times the Iceland's Strongest Man, he is the only person to have won the World's Strongest Man, the Europe's Strongest Man and the Arnold Strongman Classic in the same calendar year, which he achieved in 2018. Known by his epithets 'king of the deadlift' and 'king of the stones', he is also the reigning World deadlift champion, Eisenhart deadlift champion and the all-time deadlift world record holder at 510 kg (1,124.36 lb). Revered for his brute strength, Hafþór is regarded by many strength analysts and experts as "the strongest man to have ever lived".

Hafþór has also appeared on television as an actor, portraying Ser Gregor "the Mountain" Clegane in the HBO series Game of Thrones for five seasons. He is often simply referred to as "Thor" or "the Mountain", the latter for his Game of Thrones character and his own massive size.