Julius Bjornnsson is officially entering the realm.
Previously, the role of Clegane -- a.k.a The Mountain -- was played by Conan Stevens for two episodes of Season 1, followed by Ian Whyte, who took over the role in Season 2.
Bjornsson tweeted the news on Tuesday.
For all my fans! I am happy to tell you that I will be THE MOUNTAIN In season 4 In Game Of Thrones :)
— Hafþór J Björnsson (@ThorBjornsson_) September 3, 2013
"Game Of Thrones" Season 4 premieres on HBO in 2014.