Harley Rummel
Warren Beatty
Michele O'Brien
Leslie Caron
Staff Doctor
Michael Kane
Glue Sniffer
Riggs O'Hara
Rusty's Mother
Mavis Villiers
Mail-Order Film Girl
Margaret Nolan
Viviane Ventura
Neighbour
George Moon
Charlotte Holland
Vittorio Fettucini
Ferdy Mayne
Clinic Mother
Libby Morris
Pet Shop Customer
Bessie Love
Dr. Philip Brock
Robert Cummings
Mrs. B.M. von Crispin
Jill Adams
Autograph Seeking Father (uncredited)
Donald Sutherland
Autograph Seeking Mother (uncredited)
Jo Anne Worley
Mrs. Egan (uncredited)
Anita Sharp-Bolster
Grocery Clerk (uncredited)
Chuck Julian
Nurse (uncredited)
Vera Goulet
Heathcliff – Beatnik (uncredited)
Michael Chaplin
Woman in Audience (uncredited)
Pauline Chamberlain
Angelo Carelli
Keenan Wynn
Sam
Lionel Stander
Rusty
Asa Maynor
Mrs. Brock
Cathleen Nesbitt
John Thomas
Michael Bradley
Frank Focus / Panel Moderator
Warren Mitchell
Panel Participant
Sydney Tafler
Choreographer
Lionel Blair
Director
Arthur Hiller
Director of Photography
Douglas Slocombe
Screenplay
William Peter Blatty
Unit Manager
John Wakefield
Producer
Stanley Rubin
Original Music Composer
Lyn Murray
Editor
John Shirley
Casting
Maude Spector
Production Design
Wilfred Shingleton
Set Decoration
David Ffolkes
Costume Design
Beatrice Dawson
Makeup Artist
Bob Lawrance
Hairstylist
Pat McDermott
Charles E. Parker
Production Manager
Ronnie Bear
Second Unit Director
Urnee Robinson
Sound
John Cox
Sound Editor
Christopher Lancaster
George Stephenson
Camera Operator
Bert Mason
Chic Waterson
Focus Puller
Robin Vidgeon
Wardrobe Supervisor
John Briggs
Jean Fairlie
Title Designer
Maurice Binder
Script Supervisor
Angela Allen
Original Story
Arne Sultan
Marvin Worth
Assistant Director
Ted Sturgis