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".
Grýla Grýla is a mythical giantess living in the mountains of Iceland. Most of the stories told about Gryla were to frighten bad children, and her name is mentioned in Snorri Sturluson's thirteenth century "Edda".