Marvel Studios has chosen its god of Thunder: Australian thesp Chris Hemsworth is in final negotiations to play Thor in the comicbook company’s bigscreen adaptation of the character.

Kenneth Branagh will helm the actioner, set to bow on May 20, 2011.

Marvel has been on the hunt for a thesp with the athleticism and acting chops to pull off one of the more unusual superheroes in the company’s pantheon. Final points of Hemsworth’s deal were still being wrapped up over the weekend.

A Norse god, Thor develops a protective affinity for humans after his father Odin banishes him to Earth, in order to teach him a lesson in humility. From then on, he’s often seen wielding his massive hammer and fighting alongside the Avengers (comprised of Iron Man, the Hulk and Captain America).

Hemsworth would also play the character in Marvel’s planned “Avengers” team up pic in 2012.

Hemsworth, who stars in MGM’s upcoming “Cabin in the Woods,” was also just cast in that studio’s remake of “Red Dawn” as Jed Eckert, the role originally played by Patrick Swayze in 1984. Hemsworth was most recently seen in Paramount’s “Star Trek” playing Capt. Kirk’s father.