Billy
Leonardo DiCaprio
Colin
Matt Damon
Barrigan
James Badge Dale
MA State Police Detective
Kim Carrell
Adult Film Actress (uncredited)
Rebecca Love
Fitzy
David O'Hara
Delahunt
Mark Rolston
Lazio (FBI)
Robert Wahlberg
Gwen
Kristen Dalton
Govenor
Thomas B. Duffy
Uncle Edward
Richard Hughes
Realtor
J.C. MacKenzie
Billy's Aunt
Mary Klug
Mrs. Kennefick
Peg Holzemer
Costello
Jack Nicholson
Triad Boss
Robert 'Toshi' Kar Yuen Chan
Pakistani Proprietor
Gurdeep Singh
Providence Gangster #1
Armen Garo
Providence Gangster #2
John Cenatiempo
Kneecapped Bankrobber
Joseph Riccobene
Detective #1 Tailing Queenan
Billy Smith
Translator
Lyman Chen
Detective #1 - Colin's Unit
Kevin P. McCarthy
Detective #2 - Colin's Unit
Chris Fischer
Man Glassed in Bar
Brian Smyj
Dignam
Mark Wahlberg
Older Priest
William Severs
Younger Priest
Larry Mitchell
Police Camera Tech
Anthony Estrella
Police Cell Phone Tech
Andrew Breving
Darlene the Secretary
Tracey Paleo
Man Killed by French
Douglas Crosby
Woman at Bar #1
Dorothy Lyman
Woman at Bar #2
Audrie Neenan
News Anchor
Frank Mallicoat
Billy's Mother
Paula DeMers
Queenan
Martin Sheen
Young Colin
Conor Donovan
Carmen
Amanda Lynch
Woman at Opera
Sallie Toussaint
Bookie Harassed by French
Patrick Coppola
Jimmy Bags
Mick O'Rourke
Sister Mary Theresa
Deborah Carlson
Queenan's Secretary
Nellie Sciutto
Other Prisoner
Peter Welch
Chinese Government Man
Henry Yuk
Costello's Crew #1
Dennis Lynch
Mr. French
Ray Winstone
Costello's Crew #2
Michael Byron
Costello's Crew #3
William Lee
Luncheonette Proprietor
John Rue
Man in Costello's Bar
Peter Crafts
Priest w/ Young Colin
Joseph P. Reidy
Priest at Billy's Funeral
John Farrer
Jimmy Pappas
Paris Karounos
Detective #2 Tailing Queenan
Brian Haley
Detective #3 Tailing Queenan
Terry Serpico
Detective #4 Tailing Queenan
Jay Giannone
Madolyn
Vera Farmiga
Lynn Detective
John Polce
Drill Instructor #2 (voice)
Bo Cleary
Gang Member with Mr. French
David Conley
Chinese Delivery Man
Victor Chan
Executed Woman
Jill Brown
French's Wife
Sarah Fearon
Woman Doctor
Denece Ryland
Crack House Cop #1
Daniel F. Risteen, Jr.
Crack House Cop #2
Francis P. Hughes
Crack Addict
Johnny Cicco
Brown
Anthony Anderson
Exam Instructor
Chance Kelly
Bartender at Brasserie
Shay Duffin
Bookie in Costello's Bar
John McConnell
State Trooper #1
Kenneth Stoddard
State Trooper #2
Jeffrey Winter
New Guy
Paddy Curran
Mark Philip Patrick
Executed Man
David Fischer
Waiter in Alley
Walter Y.F. Wong
Tony M. Yee
Ellerby
Alec Baldwin
Little Girl at Airport
Francesca Scorsese
Young Man at Airport
Alex Morris
Woman with Dog
Emma Tillinger Koskoff
Crack House Denizen
Craig 'Radioman' Castaldo
Triad (uncredited)
Takumi Bando
Reporter (uncredited)
Eric Bruno Borgman
Irish Thug (uncredited)
Brendan Burke
Gang Member (uncredited)
Chris Chinn
Crime Scene Unit (uncredited)
Jeffrey Corazzini
Cadet (uncredited)
Jim Ford
Cousin Sean
Kevin Corrigan
Woman Office Worker (uncredited)
Trudi Goodman
Academy Pistol Coach (uncredited)
Steve Lord
EMT (uncredited)
Jack McCullough
Osmani Rodriguez
Academy Firearms Instructor (uncredited)
Lawrence Cameron Steele
Rugby Fan (uncredited)
Conor Timmis
Officer (uncredited)
Joseph Oliveira
Southie Teen / Soccer Player (uncredited)
Adam Masnyk
Pedestrian (uncredited)
John Franchi
Subway Passenger (uncredited)
Paul McGillicuddy
Actor's Assistant
Eric Weinstein
Stunts
Blaise Corrigan
Editor
Thelma Schoonmaker
Original Film Writer
Felix Chong
Visual Effects Supervisor
Robert Legato
Second Unit Director
G. A. Aguilar
Stunt Coordinator
Producer
Graham King
Original Music Composer
Howard Shore
Other
Andrew Lau Wai-Keung
Makeup Artist
Donald Mowat
Jodi Michelle Pynn
Shawnna Thibodeau
Executive Producer
Roy Lee
Michael Arthur
Production Design
Kristi Zea
Associate Producer
Assistant Director
Screenplay
William Monahan
Dialect Coach
Tim Monich
Brad Grey
Director
Martin Scorsese
Peewee Piemonte
Chris Cenatiempo
Brad Pitt
Alan Mak
Director of Photography
Michael Ballhaus
Costume Design
Sandy Powell
Casting
Ellen Lewis
Hairstylist
Kay Georgiou
Special Effects Coordinator
Steven Kirshoff
Set Decoration
Leslie E. Rollins
Kathryn Blondell
Supervising Sound Editor
Philip Stockton
Camera Operator
Thomas Lappin
Script Supervisor
Martha Pinson
Art Direction
Teresa Carriker-Thayer
Joy Zapata
John Caglione Jr.
Still Photographer
Andrew Cooper
Location Manager
Carla Raij
Sian Grigg
Visual Effects Producer
Ron Ames
Sound Re-Recording Mixer
Tom Fleischman
Music Editor
Jennifer Dunnington
Tass Filipos
Michael Germain
Art Department Coordinator
Erik Knight
Assistant Art Director
Marion Kolsby
Sound Effects Editor
Eugene Gearty
Johnny Villanueva
Construction Coordinator
Theodore Suchecki
Allan Zaleski
Bruce MacCallum
Andrew Rowlands
Digital Intermediate
Devin Sterling
Christine Beveridge
Robert Thayer
Transportation Coordinator
Robert Martini
Costume Supervisor
Thomas Stokes
David Davenport
Unit Publicist
Larry Kaplan
David Ebner
G. Mac Brown
Susan Perlman
Special Effects
Brian Ricci
Doug Davison
William 'Billy Jack' Jakielaszek
Electrician
Timothy Healy
Post Production Supervisor
Paul A. Levin
David Swayze
Scenic Artist
Lisa Shaftel
Joseph S. Alfieri
Dialogue Editor
Jac Rubenstein
Property Master
Robert Griffon Jr.
Lauren Hayward
Janet Paparazzo
Stunt Driver
Joseph Zamparelli
George B. Colucci Jr.
Foley Artist
Marko Costanzo
Foley Editor
Jamie Baker
ADR Supervisor
Jeffrey Stern
Marissa Littlefield
Kam Chan