Colin Farrell as Marty Faranan

Sam Rockwell as Billy Bickle

Woody Harrelson as Charlie Costello

Christopher Walken as Hans Kieslowski

Olga Kurylenko as Angela

Tom Waits as Zachariah Rigby

Abbie Cornish as Kaya

Michael Stuhlbarg as Tommy

Kevin Corrigan as Dennis

Zeljko Ivanek as Paolo

Michael Pitt as Larry

Linda Bright Clay as Myra Kieslowski

Joseph Lyle Taylor as Al

Gabourey Sidibe as Sharice

Amanda Warren as Maggie

Helena Mattsson as Blonde Lady

Harry Dean Stanton as Man in Hat

James Landry Hébert as Killer

Christopher Gehrman as Cellmate

Christian Barillas as Catholic Priest

Long Nguyen as Vietnamese Priest

Christine Marzano as The Hooker

Frank Alvarez as Hispanic Guy

Brendan Sexton III as Young Zachariah

John Bishop as The Butcher

Richard Wharton as The Hippy

Johnny Bolton as Barman

Ronnie Gene Blevins as First Cop

Tai Chan Ngo as Fellow Monk

Kiran Deol as Doctor (uncredited)

Patrick O'Connor as Judge (uncredited)

Samantha Cutaran as Receptionist (uncredited)

Chester the Chihuahua as Warehouse Dog (uncredited)

Bonny as Bonny