Al Pacino
as Sonny

John Cazale
as Sal

Charles Durning
as Moretti

Chris Sarandon
as Leon

James Broderick
as Sheldon

Penelope Allen
as Sylvia

Sully Boyar
as Mulvaney

Beulah Garrick
as Margaret

Carol Kane
as Jenny

Sandra Kazan
as Deborah

Marcia Jean Kurtz
as Miriam

Amy Levitt
as Maria

John Marriott
as Howard

Estelle Omens
as Edna

Gary Springer
as Stevie

Carmine Foresta
as Carmine

Lance Henriksen
as Murphy

Floyd Levine
as Phone Cop

Dick Anthony Williams
as Limo Driver

Dominic Chianese
as Father

Marcia Haufrecht
as Neighbor

Judith Malina
as Mother

Susan Peretz
as Angie

William Bogert
as TV Anchorman

Ron Cummins
as TV Reporter

Jay Gerber
as Sam

Philip Charles MacKenzie
as Doctor

Chu Chu Malave
as Maria's Boyfriend

Lionel Pina
as Pizza Boy

Robert Costanzo
as New York Policeman (uncredited)

Ron Gilbert
as Detective (uncredited)

Kenneth McMillan
as Commissioner (uncredited)

Ed Metzger
as Sgt. Murray (uncredited)

Lynette Sheldon
as Sadie (uncredited)

Alan Berger
as Lout (uncredited)

James Bulleit
as Sgt. Gillis (uncredited)

Todd Everett
as Cop (uncredited)

Raymond Serra
as New York Plainclothes Cop (uncredited)

Tom Towles
as Cop (uncredited)