L.A. Noir: 'The Gangster Squad'

In Warner Bros.' upcoming action drama "The Gangster Squad," based on a series of Los Angeles Times articles, Josh Brolin plays John O'Mara, a Los Angeles police officer in an elite unit devoted to cleaning up the city's criminal element, specifically targeting a mobster operation run by Mickey Cohen (Sean Penn) — the movie's ensemble cast also features Ryan Gosling, Emma Stone, Nick Nolte, Giovanni Ribisi and Anthony Mackie, among others.

By Nicole Sperling

January 15, 2012