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.
As he enjoys the label of Earth's Mightiest Hero; Thor finds himself challenged by Amora, the Enchantress, and Skurge, the Executioner. But, he must be able to face them with the help of his brother, Loki.