Warren Beatty

Harley Rummel

Leslie Caron

Michele O'Brien

Robert Cummings

Dr. Philip Brock

Keenan Wynn

Angelo Carelli

Lionel Stander

Sam

Asa Maynor

Rusty

Cathleen Nesbitt

Mrs. Brock

Michael Bradley

John Thomas

Warren Mitchell

Frank Focus / Panel Moderator

Sydney Tafler

Panel Participant

Michael Kane

Staff Doctor

Riggs O'Hara

Glue Sniffer

Mavis Villiers

Rusty's Mother

Margaret Nolan

Mail-Order Film Girl

Viviane Ventura

Mail-Order Film Girl

George Moon

Neighbour

Charlotte Holland

Neighbour

Ferdy Mayne

Vittorio Fettucini

Libby Morris

Clinic Mother

Bessie Love

Pet Shop Customer

Jill Adams

Mrs. B.M. von Crispin

Donald Sutherland

Autograph Seeking Father (uncredited)

Jo Anne Worley

Autograph Seeking Mother (uncredited)

Anita Sharp-Bolster

Mrs. Egan (uncredited)

Chuck Julian

Grocery Clerk (uncredited)

Vera Goulet

Nurse (uncredited)

Michael Chaplin

Heathcliff – Beatnik (uncredited)

Pauline Chamberlain

Woman in Audience (uncredited)