It appears that the cast of The Expendables 2 won’t be entirely made up of aging action stars. Fresh off his role in Gary Ross’ highly anticipated adaptation of The Hunger Games, Liam Hemsworth has joined the cast of the action flick. We recently reported that rumored additions Jean-Claude Van Damme and Chuck Norris are confirmed to be appearing in the film, with Arnold Schwarzenegger and Bruce Willis set to reprise their roles from the first outing. Sylvester Stallone toplines, with Jet Li, Jason Statham, Dolph Lundgren, Mickey Rourke, and Terry Crews all set to return as well.Variety's reports states that Hemsworth will be playing a sniper in the film. Statham recently told Steve that filming begins at the end of this month in Bulgaria. One can safely assume that the story involves guns and explosions. That leaves John Travolta and Donnie Yen as the other two rumored additions that have yet to be confirmed. Simon West (Con Air) is directing. The Expendables 2 opens August 17, 2012.