Ben Gazzara

John Resko

Stuart Whitman

Principal Keeper

Ray Walston

Iggy

Vincent Price

Carl Carmer

Rod Steiger

Tiptoes

Broderick Crawford

Warden

Dodie Stevens

Resko's Sister

Jack Kruschen

Resko's Father

Sammy Davis Jr.

Wino

Naomi Stevens

Resko's Mother

Adam Williams

Guard

Jack Albertson

Teach

John Kellogg

Guard

Robert H. Harris

Commissioner

Carmen Phillips

Connie Resko

Timothy Carey

Nick

Myron Healey

Gunther

Lee Krieger

Stanley

Josip Elic

Vic the Barber

Arthur Malet

Storekeeper

Robert Christopher

Guard

Reggie Nalder

Greer

Kreg Martin

Guard

Susan Silo

Cathy (as an adult)

Tom Gilson

Lefty

Roland La Starza

Duke

Warren J. Kemmerling

Guard

Andy Albin

Inmate

John Close

Guard

John Dennis

Cell Block Guard

Billy Varga

Guard

Burt Lange

Gallery Man

Vincent Barbi

Painter (uncredited)

Peter Besbas

Sculptor (uncredited)

John Dierkes

Cell Block Guard (uncredited)

Bobby Gilbert

Sculptor (uncredited)

Sid Kane

Sculptor (uncredited)

Lenny Kent

Painter (uncredited)

Johnny Kern

Convict (uncredited)

Ernesto Molinari

Sculptor (uncredited)