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.
It is a prequel to the Game of Thrones television series that will explore the events of Robert Baratheon's Rebellion and the Greyjoy's Rebellion, 27 years before the events of the main series. A total of 10 seasons, with maybe 10 episodes each.
