Hafþór Júlíus Björnsson is an Icelandic professional strongman, actor, and former professional basketball player.
He plays Ser Gregor "The Mountain" Clegane in the HBO series Game of Thrones.
The film centers on two opposite teams fighting in an ostensible civil war—shown to actually be a live fire exercise for elite soldiers—in the middle of Blood Gulch, a desolate box canyon.
