The Mountain Got Different Actors. In season one it was australian actor conan stevens. In season 2 he was replaced by stuntman ian whyte.

Gregor clegane nicknamed the mountain that rides or simply the mountain is a fictional character in the a song of ice and fire series of fantasy novels by american author george r. He was born in 1988. It looks like he can take that hot chocolate down like a shot the top comment from redditor redheadkai says.
After appearing in game of thrones stevens was cast as an orc king in the hobbit film series.
Gregor the mountain clegane. Gregor the mountain clegane. Though some of the characters are minor enough that fans probably missed the change bigger roles were slyly replaced with similar looking actors. While björnsson s held the role the longest whyte s actually.