All Three Actors Who Played Gregor 'The Mountain' Clegane in Game of Thrones, Explained

Gregor "The Mountain" Clegane is one of Game of Thrones' most distinctive characters thanks to his huge stature and ruthless personality. As the brutal older brother of Sandor "The Hound" Clegane, The Mountain left a trail of violence throughout Westeros, and he became one of George R. R. Martin's most feared knights. But despite his memorable presence, not every Game of Thrones fan realized the character was portrayed by three separate actors throughout the show's eight-season run.