Anthony Anderson

Brown

Vera Farmiga

Madolyn

Alec Baldwin

Ellerby

Matt Damon

Colin

Ray Winstone

Mr. French

Mark Wahlberg

Dignam

Leonardo DiCaprio

Billy

Martin Scorsese

Director

Martin Sheen

Queenan

Kevin Corrigan

Cousin Sean

Roy Lee

Executive Producer

James Badge Dale

Barrigan

Jack Nicholson

Costello

Mark Rolston

Delahunt

David O'Hara

Fitzy

Kristen Dalton

Gwen

G. Mac Brown

Executive Producer

John Cenatiempo

Providence Gangster #2

J.C. MacKenzie

Realtor

Robert Wahlberg

Lazio (FBI)

Thomas B. Duffy

Govenor

Richard Hughes

Uncle Edward

Mary Klug

Billy's Aunt

Peg Holzemer

Mrs. Kennefick

Robert 'Toshi' Kar Yuen Chan

Triad Boss

Gurdeep Singh

Pakistani Proprietor

Armen Garo

Providence Gangster #1

Doug Davison

Executive Producer