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.
Mutants have long remained in hiding, but when mutant terrorist Magneto reveals himself with a nefarious plan to wipe out humans, Professor Charles Xavier rallies his best students to form a new group of the X-Men.