Thor star Chris Hemsworth will not be in American Assassin after all, Deadline has learned. He turned down CBS Films‘ offer to play terrorist hunter Mitch Rapp over scheduling issues, a source says. “The truth is the deal never came together because of timing,” the source said. Hemsworth, who recently signed with CAA, is certainly busy. The actor is reprising his role in Thor 2, then has the Steven Spielberg-directed Robopocalypse and The Avengers 2 on the books. American Assassin is based on the best selling Vince Flynn novel of the same name.