Jonathan Haze

Character: Seymour Krelborn

Jackie Joseph

Character: Audrey Fulquard

Mel Welles

Character: Gravis Mushnick

Dick Miller

Character: Burson Fouch

Myrtle Vail

Character: Winifred Krelborn

Karyn Kupcinet

Character: Shirley

Toby Michaels

Character: Teenage Girl

Wally Campo

Character: Det. Sgt. Joe Fink / Narrator

Jack Nicholson

Character: Wilbur Force

Leola Wendorff

Character: Siddie Shiva

Lynn Storey

Character: Mrs. Hortense Feuchtwanger

Jack Warford

Character: Det. Frank Stoolie

Meri Welles

Character: Leonora Clyde

John Herman Shaner

Character: Dr. Phoebus Farb

Dodie Drake

Character: Waitress

Charles B. Griffith

Character: Screaming Patient/ Audrey Junior (voice) / Burglar (uncredited)

Frank Mills

Character: Man in Crowd Outside Shop (uncredited)

Jack Griffin

Character: Drunk (uncredited)

Robert Coogan

Character: Tramp (uncredited)