“Sons of Anarchy” star Charlie Hunnam is set to star in director Guillermo Del Toro’s mecha-influenced robot movie Pacific Rim. Written by Clash of the Titans scribe Travis Beacham, the film revolves around human-piloted robots built to defend the earth against giant alien creatures.

Hunnam, best known for his role as Jackson “Jax” Teller on the F/X’s biker drama “Sons of Anarchy,” will play the heroic pilot who must save the day … or not. Plot details are being kept under wraps. The film marks Del Toro’s return to the director’s chair since 2008’s Hellboy II: The Golden Army.

Pacific Rim goes into production in September. Legendary Pictures and Warner Bros. are looking at a summer 2013 release.