- Barbara Parkins
- Anne Welles
- Patty Duke
- Neely O'Hara
- Sharon Tate
- Jennifer North
- Paul Burke
- Lyon Burke
- Tony Scotti
- Tony Polar
- Martin Milner
- Mel Anderson
- Charles Drake
- Kevin Gillmore
- Alexander Davion
- Ted Casablanca
- Lee Grant
- Miriam Polar
- Naomi Stevens
- Miss Steinberg
- Robert H. Harris
- Henry Bellamy
- Jacqueline Susann
- First Reporter at Jennifer's suicide, Screenwriter
- Robert Viharo
- Film director
- George Jessel
- MC at Grammy Awards
- Susan Hayward
- Helen Lawson
- Mikel Angel
- Man in hotel room (uncredited)
- Barry Cahill
- Man in bar (uncredited)
- Richard Angarola
- Claude Chardot (uncredited)
- Joey Bishop
- MC at Cystic Fibrosis telethon
- Judith Lowry
- Aunt Amy (uncredited)
- Jeanne Gerson
- Neely's maid (uncredited)
- Richard Dreyfuss
- Assistant stage manager (uncredited)
- Mark Robson
- Director
- Helen Deutsch
- Writer
- Jacqueline Susann
- First Reporter at Jennifer's suicide, Screenwriter
- David Weisbart
- Producer
- André Previn
- Original Music and Songs
- Dory Previn
- Original Music and Songs
- John Williams
- Original Music
- William H. Daniels
- Cinematographer
- Dorothy Spencer
- Film Editing
- Joe Scully
- Casting
- Philip M. Jefferies
- Production Design
- Richard Day
- Art Director
- Jack Martin Smith
- Art Director
- Raphael Bretton
- Set Decoration
- Walter M. Scott
- Set Decoration
