Billy Costigan

Leonardo DiCaprio

Colin Sullivan

Matt Damon

Frank Costello

Jack Nicholson

Sgt. Dignam

Mark Wahlberg

Capt. Queenan

Martin Sheen

Mr. French

Ray Winstone

Madolyn

Vera Farmiga

Capt. Ellerby

Alec Baldwin

Brown

Anthony Anderson

Barrigan

James Badge Dale

Fitzy

David Patrick O'Hara

Delahunt

Mark Rolston

Cousin Sean

Kevin Corrigan

Lazio

Robert Wahlberg

Gwen

Kristen Dalton

Govenor

Thomas B. Duffy

Carmen

Amanda Lynch

Darleen

Tracey Paleo

Realtor

J.C. MacKenzie

Billy's father

Tom Kemp

Billy's Aunt

Mary Klug

Mrs. Kennefick

Peg Holzemer

Uncle Edward

Richard Hughes

Jonny

Gary Lockwood

Triad Boss

Robert Chan

Realtor

J. C. MacKenzie

Pakistani Proprietor

Gurdeep Singh

Providence Gangster #1

Armen Garo

Providence Gangster #2

John Cenatiempo

Triad Boss

Robert 'Toshi' Kar Yuen Chan

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

Older Priest

William Severs

Police Camera Tech

Anthony Estrella

Police Cell Phone Tech

Andrew Breving

Younger Priest

Larry Mitchell

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

Young Colin

Conor Donovan

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

Chinese Government Man

Henry Yuk

Costello's Crew #1

Dennis Lynch

Costello's Crew #2

Michael Byron

Other Prisoner

Peter Welch

Luncheonette Proprietor

John Rue

Costello's Crew #3

William Lee

Priest w

Joseph Reidy

Jimmy Pappas

Paris Karounos

Man in Costello's Bar

Peter Crafts

Detective #2 Tailing Queenan

Brian Haley

Priest w / Young Colin

Joseph P. Reidy

Detective #3 Tailing Queenan

Terry Serpico

Priest at Billy's Funeral

John Farrer

Detective #4 Tailing Queenan

Jay Giannone

Lynn Detective

John Polce

Drill Instructor #2

Bo Cleary

Gang Member with Mr. French

David Conley

Gerard McSorley

Chinese Delivery Man

Victor Chan

Executed Woman

Jill Brown

French's Wife

Sarah Fearon

Woman Doctor

Denece Ryland

Crack Addict

Johnny Cicco

Exam Instructor

Chance Kelly

Crack House Cop #1

Daniel F. Risteen

Bartender at Brasserie

Shay Duffin

Crack House Cop #2

Francis P. Hughes

State Trooper #2

Jeffrey Winter

Bookie in Costello's Bar

John McConnell

New Guy

Paddy Curran

New Guy

Mark Philip Patrick

State Trooper #1

Kenneth Stoddard

Little Girl at Airport

Francesca Scorsese

Executed Man

David Fischer

Waiter in Alley

Walter Y.F. Wong

Woman with Dog

Emma Tillinger

Waiter in Alley

Tony M. Yee

Crack House Denizen

Craig Castaldo

Triad

Takumi Bando

Young Man at Airport

Alex Morris

Reporter

Eric Bruno Borgman

Woman with Dog

Emma Tillinger Koskoff

Crack House Denizen

Craig 'Radioman' Castaldo

Southie Teen

Adam Masnyk

MA State Police Detective

Kim Carrell

Crime Scene Unit

Jeffrey Corazzini

Cadet

Jim Ford

Woman Office Worker

Trudi Goodman

Academy Pistol Coach

Steve Lord

Reporter

Osmani Rodriguez

Academy Firearms Instructor

Cameron Steele

Rugby Fan

Conor Timmis

Officer

Joseph Oliveira

Pedestrian

John Franchi

Adult Film Actress

Rebecca Love