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.
When the Joker seizes control of Arkham Asylum and releases its inmates in an attempt to destroy Gotham City, the dark knight finds himself trapped inside with his greatest foes and must find a way to stop them before it is too late.
