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.
This is the cast pitched by Marvel fan, Bryan Seeker. It is a possible cast if the X-Men are introduced into the Marvel Cinematic Universe. You can find Bryan Seeker's casting series here:
https://www.youtube.com/playlist?list=PLR0EAiVr-Zt1e9dTieTW1WEZP15Hl2xPG
