Leonardo DiCaprio
Billy
Matt Damon
Colin
Jack Nicholson
Costello
Mark Wahlberg
Dignam
Martin Sheen
Queenan
Ray Winstone
Mr. French
Vera Farmiga
Madolyn
Anthony Anderson
Brown
Alec Baldwin
Ellerby
Kevin Corrigan
Cousin Sean
James Badge Dale
Barrigan
David O'Hara
Fitzy
Mark Rolston
Delahunt
Robert Wahlberg
Lazio (FBI)
Kristen Dalton
Gwen
J.C. MacKenzie
Realtor
Peg Holzemer
Mrs. Kennefick
Gurdeep Singh
Pakistani Proprietor
Armen Garo
Providence Gangster #1
John Cenatiempo
Providence Gangster #2
Joseph Riccobene
Kneecapped Bankrobber
Billy Smith
Detective #1 Tailing Queenan
Lyman Chen
Translator
Kevin P. McCarthy
Detective #1 - Colin's Unit
Chris Fischer
Detective #2 - Colin's Unit
Brian Smyj
Man Glassed in Bar
Larry Mitchell
Younger Priest
Anthony Estrella
Police Camera Tech
Tracey Paleo
Darlene the Secretary
Dorothy Lyman
Woman at Bar #1
Audrie Neenan
Woman at Bar #2
Conor Donovan
Young Colin
Patrick Coppola
Bookie Harassed by French
Mick O'Rourke
Jimmy Bags
Nellie Sciutto
Queenan's Secretary
Henry Yuk
Chinese Government Man
Dennis Lynch
Costello's Crew #1
Michael Byron
Costello's Crew #2
John Rue
Luncheonette Proprietor
Joseph P. Reidy
Priest w/ Young Colin
Brian Haley
Detective #2 Tailing Queenan
Terry Serpico
Detective #3 Tailing Queenan
Jay Giannone
Detective #4 Tailing Queenan
John Polce
Lynn Detective
Jill Brown
Executed Woman
Sarah Fearon
French's Wife
Denece Ryland
Woman Doctor
Johnny Cicco
Crack Addict
Chance Kelly
Exam Instructor
Shay Duffin
Bartender at Brasserie
Francesca Scorsese
Little Girl at Airport
Emma Tillinger Koskoff
Woman with Dog
Craig 'Radioman' Castaldo
Crack House Denizen
Eric Bruno Borgman
Reporter (uncredited)
Brendan Burke
Irish Thug (uncredited)
Jeffrey Corazzini
Crime Scene Unit (uncredited)
Jim Ford
Cadet (uncredited)
Lawrence Cameron Steele
Academy Firearms Instructor (uncredited)
Joseph Oliveira
Officer (uncredited)
John Franchi
Pedestrian (uncredited)
Kim Carrell
MA State Police Detective
Rebecca Love
Adult Film Actress (uncredited)
Thomas B. Duffy
Govenor
Richard Hughes
Uncle Edward
Mary Klug
Billy's Aunt
Robert 'Toshi' Kar Yuen Chan
Triad Boss
William Severs
Older Priest
Andrew Breving
Police Cell Phone Tech
Douglas Crosby
Man Killed by French
Frank Mallicoat
News Anchor
Paula DeMers
Billy's Mother
Amanda Lynch
Carmen
Sallie Toussaint
Woman at Opera
Deborah Carlson
Sister Mary Theresa
Peter Welch
Other Prisoner
William Lee
Costello's Crew #3
Peter Crafts
Man in Costello's Bar
John Farrer
Priest at Billy's Funeral
Paris Karounos
Jimmy Pappas
Bo Cleary
Drill Instructor #2 (voice)
David Conley
Gang Member with Mr. French
Victor Chan
Chinese Delivery Man
Daniel F. Risteen, Jr.
Crack House Cop #1
Francis P. Hughes
Crack House Cop #2
John McConnell
Bookie in Costello's Bar
Kenneth Stoddard
State Trooper #1
Jeffrey Winter
State Trooper #2
Paddy Curran
New Guy
Mark Philip Patrick
New Guy
David Fischer
Executed Man
Walter Y.F. Wong
Waiter in Alley
Tony M. Yee
Waiter in Alley
Alex Morris
Young Man at Airport
Takumi Bando
Triad (uncredited)
Chris Chinn
Gang Member (uncredited)
Trudi Goodman
Woman Office Worker (uncredited)
Steve Lord
Academy Pistol Coach (uncredited)
Jack McCullough
EMT (uncredited)
Osmani Rodriguez
Reporter (uncredited)
Conor Timmis
Rugby Fan (uncredited)
Adam Masnyk
Southie Teen / Soccer Player (uncredited)
Paul McGillicuddy
Subway Passenger (uncredited)
