The true story of Whitey Bulger, the brother of a state senator and the most infamous violent criminal in the history of South Boston, who became an FBI informant to take down a Mafia family invading his turf.

Johnny Deppas James 'Whitey' Bulger
Joel Edgertonas John Connolly
Julianne Nicholsonas Marianne Connolly
Dakota Johnsonas Lindsey Cyr
Kevin Baconas FBI Agent Charles McGuire
Benedict Cumberbatchas Billy Bulger
Peter Sarsgaardas Brian Halloran
Juno Templeas Deborah Hussey
Jesse Plemonsas Kevin Weeks
David Harbouras John Morris
Masanobu Takayanagi