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.
Michael Holt AKA Mister Terrific, the third smartest hero in the universe assembles a team consisting of Metamorpho, Plastic Man and Phantom Girl to combat a threat that endangers the multiverse.
