Gangster Squad is a 2013 American action thriller film directed by Ruben Fleischer and written by Will Beall, based on a non-fiction book by Paul Lieberman. The film stars Josh Brolin, Ryan Gosling, Nick Nolte, Emma Stone, Anthony Mackie, Giovanni Ribisi, Robert Patrick, Michael Peña and Sean Penn. Set in 1949, a group of real-life LAPD officers and detectives called the Gangster Squad are assigned to bring down crime kingpin Mickey Cohen.

Ruben Samuel Fleischer is an American film director, film producer, television producer, music video director, and commercial director who lives in Montclair, New Jersey. He is best known as the director of Zombieland (2009), his first feature film, and its sequel Zombieland: Double Tap (2019). He has also directed the films 30 Minutes or Less, Gangster Squad, Uncharted, and 2018's Venom featuring the Marvel Comics character of the same name. Prior to features, he directed television commercials for such brands as Cisco, Eurostar, ESPN, and Burger King, and music videos for artists such as M.I.A., Electric Six, DJ Format and Gold Chains.