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.
A group of former classmates gather for a pre-party at one of their homes the night before their 10-year high school reunion, and one by one, they are brutally slain in a manner befitting each's senior yearbook superlative.
