Which character is nicknamed "The Mountain" and played by Hafþór Júlíus Björnsson in the TV version of Game of Thrones?
Hafþór Júlíus Björnsson Hafþór Júlíus "Thor" Björnsson (] ; also Hafthor Julius Bjornsson, born November 26, 1988) 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".
Theon Greyjoy Theon Greyjoy is a fictional character in the "A Song of Ice and Fire" series of fantasy novels by American author George R. R. Martin, and its television adaptation "Game of Thrones". Theon is the son and heir of Balon Greyjoy, taken as a ward by Lord Eddard Stark following Balon's failed rebellion.