GOT's Jason Mamoa as Drax the Destroyer?

Been reading on several websites that actor Jason Mamoa, who played Khal Drogo on the first season on GAME OF THRONES, has been cast as   Drax the Destroyer in Marvel’s Guardians of the Galaxy.  According to several reports (this one from Examiner.com): “Mamoa was called in to screen test for James Gunn’s upcoming superhero film and delivered such a positive performance that the studio went ahead and offered him the part.”

The film is due out in August 2014. (Photos courtesy of HBO and Wikipedia)