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.
Please try to cast younger people in these roles. Batman is in his second year of crimefighting, which makes it unlikely that he will fight a Joker in his 60s. Try to be unique with these castings.
