'Game of Thrones' Recasts The Mountain for Season 4

Arya has a new guy to add to her list of people she wants dead.

Icelandic actor Hafthor Julius Bjornsson has been cast as Gregor Clegane in the upcoming fourth season of Game of Thrones, The Hollywood Reporter  has confirmed. The actor let the cat out the bag via Twitter Monday, writing "For all my fans! I am happy to tell you that I will be THE MOUNTAIN In season 4 In Game Of Thrones :)"

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Bjornsson will be the third person to play The Mountain, brother of Sandor Clegane (Rory McCann). Conan Stevens played the part for two episodes in season one, while Ian Whyte took up the mantle in season 2. Whyte also played a giant and a White Walker in the HBO hit.

Gregor did not appear in season 3, but based on what happens in George R.R. Martin's novels, the gigantic knight should have an expanded role in the upcoming season.

The casting comes after last week's reveal that Treme alum Michiel Huisman was joining the cast. Sources told THR he will replace Ed Skrein as Daario Naharis. Joseph Gatt was also recently confirmed to have joined the cast in an unspecified role, with fan speculation (fueled by his IMDB page) pegging him as Styr, Magnar of Thenn.

Game of Thrones is expected to return next year on HBO.

Additional reporting by Lesley Goldberg.