Warren Beatty

Character: Harley Rummel

Leslie Caron

Character: Michele O'Brien

Robert Cummings

Character: Dr. Philip Brock

Keenan Wynn

Character: Angelo Carelli

Lionel Stander

Character: Sam

Asa Maynor

Character: Rusty

Cathleen Nesbitt

Character: Mrs. Brock

Michael Bradley

Character: John Thomas

Warren Mitchell

Character: Frank Focus / Panel Moderator

Sydney Tafler

Character: Panel Participant

Michael Kane

Character: Staff Doctor

Riggs O'Hara

Character: Glue Sniffer

Mavis Villiers

Character: Rusty's Mother

Margaret Nolan

Character: Mail-Order Film Girl

Viviane Ventura

Character: Mail-Order Film Girl

George Moon

Character: Neighbour

Charlotte Holland

Character: Neighbour

Ferdy Mayne

Character: Vittorio Fettucini

Libby Morris

Character: Clinic Mother

Bessie Love

Character: Pet Shop Customer

Jill Adams

Character: Mrs. B.M. von Crispin

Donald Sutherland

Character: Autograph Seeking Father (uncredited)

Jo Anne Worley

Character: Autograph Seeking Mother (uncredited)

Anita Sharp-Bolster

Character: Mrs. Egan (uncredited)

Chuck Julian

Character: Grocery Clerk (uncredited)

Vera Goulet

Character: Nurse (uncredited)

Michael Chaplin

Character: Heathcliff – Beatnik (uncredited)

Pauline Chamberlain

Character: Woman in Audience (uncredited)