Trailer
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 | Johnny Depp as James 'Whitey' Bulger |
 | Joel Edgerton as John Connolly |
 | Benedict Cumberbatch as Billy Bulger |
 | Dakota Johnson as Lindsey Cyr |
 | Kevin Bacon as FBI Agent Charles McGuire |
 | Peter Sarsgaard as Brian Halloran |
 | Jesse Plemons as Kevin Weeks |
 | David Harbour as John Morris |
 | Adam Scott as FBI Agent Robert Fitzpatrick |
 | Corey Stoll as Fred Wyshak |
 | Julianne Nicholson as Marianne Connolly |
 | W. Earl Brown as John Martorano |
 | Bill Camp as John Callahan |
 | Juno Temple as Deborah Hussey |
 | Mark Mahoney as Mickey Maloney |
 | Brad Carter as John McIntyre |
 | Scott G. Anderson as Tommy King |
 | Lonnie Farmer as DEA Agent Eric Olsen (Interrogator) |
 | Mary Klug as Mom Bulger |
 | Erica McDermott as Mary Bulger |
 | Luke Ryan as Douglas Cyr |
 | Owen Burke as Buddy Leonard |
 | Lewis D. Wheeler as Jeremiah O'Sullivan |
 | Billy Meleady as Joe Cahill |
 | Jamie Donnelly as Mrs. Cody |
 | David De Beck as Roger Wheeler |
| Gary Galone as State Captain |
 | Rory Cochrane as Stephen Flemmi |
 | James Russo as Agent Scott Gariola |
 | Jeremy Strong as Josh Bond |
 | Danae Nason as McGuire's Secretary |
 | Bretton Manley as Young Boy |
 | Berglind Jonsdottir as Anna Bjornsdottir |
 | Robert Walsh as Sr. FBI Official (voice) |
 | David Conley as Officer Flynn |
 | Ciaran Crawford as Irish Nationalist |
 | Thomas Philip O'Neill as FBI Wire Tech |
 | Joey Vacchio as Joey, Big Italian |
| Bill Haims as Gennaro Angiulo |
 | Anthony Molinari as Charlie McTiernan |
 | Todd Ryan Jones as Charlie's Friend |
 | Declan Mulvey as Charlie's Friend |
 | Bates Wilder as Agent James |
| Marc Carver as Dick Lehr |
| Richard Donelly as Gerard O'Neill |
| Brian A. White as Prisoner |
 | Peter Morse as FBI Agent |
 | Tom Kemp as Father Mackey |
 | Patrick M. Walsh as Michael Donahue |
 | Naheem Garcia as DEA Agent |
| Kathryn A. Beauchamp as Nurse |
| Stephen Curran as Drug Dealer |
| Darin X.L. MacEachern as Drug Dealer |
 | Cary 'Big Shug' Guy as Drug Dealer |
| Sean Malone as Crook |
| Jack Neary as Barman |
| Jimmy Joe Maher as Boot Shop Owner |
| Forry Buckingham as World Jai Alai Chairman |
| Danny DeMiller as Porthole Bartender |
| Michael F. Murphy as Porthole Customer |
 | Alexander Cook as DEA Agent Dan Doherty |
| Ava Cooper as Little Mary Bulger |
| Stella Cooper as Kathleen Bulger |
 | Julie Ann Dawson as Floor Dancer (uncredited) |
 | Arthur Hiou as Driver |
| Sound | |
| Mark A. Mangini | Supervising Sound Editor |
| Mark A. Mangini | Sound Re-Recording Mixer |
Production | |
| Francine Maisler | Casting |
Sound | |
| Ezra Dweck | Sound Editor |
| Ron Bartlett | Sound Re-Recording Mixer |
Visual Effects | |
| Romulo Adriano Jr. | Visual Effects Coordinator |
Editing | |
| David Rosenbloom | Editor |
Writing | |
| Jez Butterworth | Screenplay |
Production | |
| Brett Ratner | Executive Producer |
Art | |
| Tracey A. Doyle | Set Decoration |
Sound | |
| Junkie XL | Original Music Composer |
Production | |
| Brian Oliver | Producer |
| Patrick McCormick | Producer |
Art | |
| Stefania Cella | Production Design |
Production | |
| Richard Mirisch | Associate Producer |
Directing | |
| Scott Cooper | Director |
Production | |
| Scott Cooper | Producer |
Lighting | |
| Morris Flam | Gaffer |
Costume & Make-Up | |
| Joel Harlow | Makeup Department Head |
Camera | |
| Masanobu Takayanagi | Director of Photography |
Production | |
| Tyler Thompson | Producer |
Crew | |
| Chuck Jeffreys | Stunt Coordinator |
Production | |
| Phil Hunt | Executive Producer |
| Compton Ross | Executive Producer |
| Michael Bassick | Co-Executive Producer |
Costume & Make-Up | |
| Kasia Walicka-Maimone | Costume Design |
Art | |
| Sarah Contant | Assistant Art Director |
Production | |
| John Lesher | Producer |
| Christopher Woodrow | Executive Producer |
| Adam Kassan | Co-Executive Producer |
Costume & Make-Up | |
| Lucia Mace | Key Hair Stylist |
Art | |
| Jeremy Woodward | Art Direction |
Writing | |
| Mark Mallouk | Screenplay |
Costume & Make-Up | |
| Virginia Johnson | Costume Supervisor |
Art | |
| Joseph Kearney | Construction Coordinator |
Production | |
| James Packer | Executive Producer |
Sound | |
| Piero Mura | Sound Effects Editor |
| Chris Jenkins | Sound Re-Recording Mixer |
| Jim Schultz | Music Editor |
Visual Effects | |
| Allison Paul | Visual Effects Producer |
Sound | |
| Ann Scibelli | Sound Designer |
Visual Effects | |
| Tim LeDoux | Visual Effects Supervisor |
| Jason Sanford | Visual Effects Producer |
Camera | |
| Claire Folger | Still Photographer |
| David B. Nowell | Helicopter Camera |
Crew | |
| John Polyson | Visual Effects Editor |
Art | |
| David Gulick | Property Master |
Camera | |
| Henry Tirl | Steadicam Operator |
Costume & Make-Up | |
| Gloria Pasqua Casny | Hair Department Head |
Production | |
| Lauren Selig | Executive Producer |
Visual Effects | |
| Sean Devereaux | Visual Effects Supervisor |
Crew | |
| Don Libby | CG Supervisor |
Lighting | |
| Scott D. Davis | Rigging Gaffer |
Crew | |
| Robert 'Rock' Galotti | Armorer |
Production | |
| Brett Granstaff | Executive Producer |
Costume & Make-Up | |
| Ben Bornstein | Makeup Artist |
Directing | |
| Tracy Scott | Script Supervisor |
Production | |
| Steven Mnuchin | Executive Producer |
| Gary Granstaff | Executive Producer |
| Peter Mallouk | Executive Producer |
| Ray Mallouk | Executive Producer |
Costume & Make-Up | |
| Khanh Trance | Wigmaker |
Art | |
| Jason Mayoh | Art Department Coordinator |
Editing | |
| Jonny Winograd | First Assistant Editor |
Costume & Make-Up | |
| Rita Troy | Hairstylist |
Sound | |
| Tom Williams | Sound mixer |
Camera | |
| James W. Apted | First Assistant Camera |
Writing | |
| Gerard O'Neill | Book |
| Dick Lehr | Book |
Sound | |
| Byron Wilson | Supervising Sound Editor |
Production | |
| Melissa Kostenbauder | Casting Associate |
Costume & Make-Up | |
| Brittany Loar | Assistant Costume Designer |
Visual Effects | |
| Paul Linden | Visual Effects Supervisor |
Production | |
| Matt Bouldry | Casting Associate |
Camera | |
| Greg Wimer | First Assistant Camera |
Costume & Make-Up | |
| Nikki Pleau | Makeup Artist |
Art | |
| Riley Fearon | Art Department Assistant |
Costume & Make-Up | |
| Cesha Ventre | Set Costumer |
Production | |
| Chuck Rock | Co-Executive Producer |
