- Johnny Depp
- James "Whitey" Bulger
- Joel Edgerton
- John Connolly
- Benedict Cumberbatch
- Bill Bulger
- Dakota Johnson
- Lindsey Cyr
- Kevin Bacon
- FBI Agent Charles McGuire
- Peter Sarsgaard
- Brian Halloran
- Jesse Plemons
- Kevin Weeks
- Rory Cochrane
- Stephen Flemmi
- David Harbour
- John Morris
- Adam Scott
- FBI Agent Robert Fitzpatrick
- Corey Stoll
- Fred Wyshak
- Julianne Nicholson
- Marianne Connolly
- W. Earl Brown
- Johnny Martorano
- Bill Camp
- John Callahan
- Juno Temple
- Deborah Hussey
- Mark Mahoney
- Mickey Mahoney
- Brad Carter
- John McIntyre
- Scott Anderson
- Tommy King
- Lonnie Farmer
- DEA Agent Eric Olsen
- Mary Klug
- Mom Bulger
- Erica McDermott
- Mary Bulger
- Luke Ryan
- Douglas Cyr
- Scott Cooper
- Director, Producer
- 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
