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.
An average man furloughed from his job decides to make some extra money for himself and his wife by lodging in an experimental homestay ran by an eccentric billionaire. Only to discover that the confines of his lavish abode are growing the longer he stays; and that getting out won’t be as simple as he had hoped.