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.
You already know, mark Grayson got superpowers, his father is evil, he has to deal with everyday things while also having superhero responsibilities, bla bla bla, to show that he's *title card*
