Hafþór Júlíus Björnsson
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.
Hafþór Júlíus Björnsson's screen work to date leans strongly toward Action and Drama, a consistent thread across his credits so far.
Hafþór Júlíus Björnsson's most notable role to date came in Game of Thrones (2011), where he played Gregor 'The Mountain' Clegane. He also appeared in The Northman (2022) as Thórfinnr Tooth-Gnasher. Most recently appeared in Masters of the Universe (2026) as Goat Man.
Fans wanting to catch up on Hafþór Júlíus Björnsson's work can find exactly where his shows and movies are streaming below — and TV Butler Pro makes it effortless to keep track of them all. Just search the title, and Butler finds it instantly, tells you which service has it, and remembers what you've already watched.
