Actor Troy Garity, who can be seen in the upcoming Starz series Boss, has joined the cast of The Gangster Squad for Warner Bros.

Troy Garity will play a one-eyed assassin who Mickey Cohen (Sean Penn) sends after Josh Brolin and Ryan Gosling's characters. Troy Garity joins a cast which also includes Emma Stone, Giovanni Ribisi, Michael Peña, Anthony Mackie, Holt McCallany, and Robert Patrick.

Ruben Fleischer is directing The Gangster Squad from a screenplay by former L.A.P.D. officer Will Beall. Production is already under way in Los Angeles.