Scott Cooper Director, Producer Johnny Depp James "Whitey" Bulger Actor Joel Edgerton John Connolly Actor Benedict Cumberbatch Bill Bulger Actor Dakota Johnson Lindsey Cyr Actor Kevin Bacon FBI Agent Charles McGuire Actor Peter Sarsgaard Brian Halloran Actor Jesse Plemons Kevin Weeks Actor Rory Cochrane Stephen Flemmi Actor David Harbour John Morris Actor Adam Scott FBI Agent Robert Fitzpatrick Actor Corey Stoll Fred Wyshak Actor Julianne Nicholson Marianne Connolly Actor W. Earl Brown Johnny Martorano Actor Bill Camp John Callahan Actor Juno Temple Deborah Hussey Actor Mark Mahoney Mickey Mahoney Actor Brad Carter John McIntyre Actor Scott Anderson Tommy King Actor Lonnie Farmer DEA Agent Eric Olsen Actor Mary Klug Mom Bulger Actor Erica McDermott Mary Bulger Actor Luke Ryan Douglas Cyr Actor Mark Mallouk Screenwriter Jez Butterworth Screenwriter John Lesher Producer Brian Oliver Producer Patrick McCormick Producer Tyler Thompson Producer Brett Ratner Executive Producer James Packer Executive Producer Steven Mnuchin Executive Producer Peter Mallouk Executive Producer Ray Mallouk Executive Producer Christopher Woodrow Executive Producer Brett Granstaff Executive Producer Gary Granstaff Executive Producer Phil Hunt Executive Producer Compton Ross Executive Producer Masanobu Takayanagi Cinematographer David Rosenbloom Film Editing Junkie XL Original Music Stefania Cella Production Design Jeremy Woodward Art Director Tracey Doyle Set Decoration Kasia Walicka Maimone Costume Design Francine Maisler Casting