Matt Damon Colin
Leonardo DiCaprio Billy
Mark Wahlberg Dignam
Brad Pitt Producer
Jack Nicholson Costello
Vera Farmiga Madolyn
Martin Scorsese Director
Rebecca Love Adult Film Actress (uncredited)
Alec Baldwin Ellerby
Ray Winstone Mr. French
Martin Sheen Queenan
Johnny Cicco Crack Addict
James Badge Dale Barrigan
Brian Haley Detective #2 Tailing Queenan
Anthony Anderson Brown
Kevin Corrigan Cousin Sean
Terry Serpico Detective #3 Tailing Queenan
Janet Paparazzo Stunts
Joseph P. Reidy Priest w/ Young Colin, Assistant Director
John Farrer Priest at Billy's Funeral
Mark Rolston Delahunt
David O'Hara Fitzy
Brendan Burke Irish Thug (uncredited)
G. Mac Brown Executive Producer
Dorothy Lyman Woman at Bar #1
Shay Duffin Bartender at Brasserie
Mick O'Rourke Jimmy Bags
Steve Kirshoff Special Effects Coordinator
John Cenatiempo Providence Gangster #2
Paul A. Levin Post Production Supervisor
David Fischer Executed Man
Craig 'Radio Man' Castaldo Crack House Denizen
John Caglione Jr. Makeup Artist
Brian Smyj Man Glassed in Bar
Lawrence Cameron Steele Academy Firearms Instructor (uncredited)
J.C. MacKenzie Realtor
Chance Kelly Exam Instructor
Howard Shore Original Music Composer
John Franchi Pedestrian (uncredited)
Larry Mitchell Younger Priest
Kristen Dalton Gwen
Lyman Chen Translator
Roy Lee Executive Producer
Johnny Villanueva Hairstylist
Jill Brown Executed Woman
Graham King Producer
Armen Garo Providence Gangster #1
Audrie Neenan Woman at Bar #2
Kay Georgiou Hairstylist
Ellen Lewis Casting
Christine Beveridge Makeup Artist
Brian Ricci Special Effects
Martha Pinson Script Supervisor
William Monahan Screenplay
Kathryn Blondell Hairstylist
Carla Raij Location Manager
Nellie Sciutto Queenan's Secretary
Tim Monich Dialect Coach
Kristi Zea Production Design
Donald Mowat Makeup Artist
Joseph Riccobene Kneecapped Bankrobber
Marko Costanzo Foley Artist
Robert Wahlberg Lazio (FBI)
Andrew Lau Other
Jennifer Dunnington Music Editor
Thelma Schoonmaker Editor
Cathy Scorsese Props
Jodi Michelle Pynn Stunts
Tom Fleischman Sound Re-Recording Mixer
Blaise Corrigan Stunts
Billy Smith Detective #1 Tailing Queenan
G.A. Aguilar Stunt Coordinator, Second Unit Director