HBO provides some casting confirmations 

We’ve had quite a few castings leak out via Twitter atau through the actor’s CVs on Spotlight atau their agency profile. Although these were strong signs that the casting was legit, it is still nice to get official confirmation from HBO.
kata kunci: Game of Thrones, season 2, casting, steven cole, kovarro, nicholas blane, spice king, tony way, dontos hollard, sam callis