Robert De Niro as John 'Johnny Boy' Civello

Harvey Keitel as Charlie Cappa

David Proval as Tony DeVienazo

Amy Robinson as Teresa Ronchelli

Richard Romanus as Michael Longo

Cesare Danova as Giovanni Cappa

Victor Argo as Mario

George Memmoli as Joey 'Clams' Scala

Lenny Scaletta as Jimmy

Jeannie Bell as Diane

Murray Moston as Oscar

David Carradine as Drunk

Robert Carradine as Boy With Gun

Lois Walden as Jewish Girl

Harry Northup as Soldier

Dino Seragusa as Old Man

D'Mitch Davis as Cop

Peter Fain as George

Juli Andelman as Girl At Party

Robert Wilder as Benton

Ken Sinclair as Sammy

Jaime Alba as Young Boy #1

Ken Konstantin as Young Boy #2

Nicki "Ack" Aquilino as Man On Docks

B. Mitchell Reed as Disc Jockey

Martin Scorsese as Jimmy Shorts (uncredited)

Catherine Scorsese as Woman on Landing (uncredited)

Vincent Price as Verden Fell (archive footage)