Holt McCallany (FX's acclaimed cancelled series LIGHTS OUT) has joined the cast of Warner Bros.' GANGSTER SQUAD, reports Deadline.com. He will play the bodyguard of gangster Mickey Cohen (Sean Penn). The story follows the special unit set up to stop Cohen from bringing East Coast crime to the West Coast.

The cast also includes Ryan Gosling, Josh Brolin, Bryan Cranston, Michael Pena, Anthony Mackie and Giovanni Ribisi.

Ruben Fleischer (ZOMBIELAND) is directing. Former cop turned screenwriter Will Beall is adapting a script from Paul Lieberman's L.A. Times series. Dan Lin and Kevin McCormick are the producers alongside co-producer Jon Silk.