Hafþór Júlíus Björnsson plays an HBO character who first appears in book form in what year?
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".
Javan Haldane Javan Haldane of Gwynedd is a fictional character in