Patty Duke as Neely O'Hara

Sharon Tate as Jennifer North

Barbara Parkins as Anne Welles

Susan Hayward as Helen Lawson

Lee Grant as Miriam Polar

Paul Burke as Lyon Burke

Martin Milner as Mel Anderson

Charles Drake as Kevin Gillmore

Alexander Davion as Ted Casablanca

Naomi Stevens as Miss Steinberg

Robert H. Harris as Henry Bellamy

Tony Scotti as Tony Polar

Jacqueline Susann as First Reporter

Robert Viharo as Director

Joey Bishop as MC at Telethon

George Jessel as MC Grammy Awards

Richard Angarola as Claude Chardot (uncredited)

Mikel Angel as Man in Sleazy Hotel Room (uncredited)

David Arkin as Western Union Boy (uncredited)

Philippe Auber as Jennifer's Leading Man (uncredited)

Billy Beck as Man Sleeping in Movie Theatre (uncredited)

Pat Becker as Telethon Telephone Girl (uncredited)

Lovyss Bradley as Nurse (uncredited)

Paul Bradley as Technician (uncredited)

Richard Brander as Assistant Director (uncredited)

Tex Brodus as Restaurant Patron (uncredited)

Marvin Brody as Movie Theatre Manager (uncredited)

Norman Burton as Neely O'Hara's Director (uncredited)

Owen Bush as Reporter at Suicide (uncredited)

Barry Cahill as San Francisco Bar Patron (uncredited)

Dick Cherney as Restaurant Patron (uncredited)

Noble 'Kid' Chissell as Pedestrian (uncredited)

Frank Coghlan Jr. as Reporter (uncredited)

Gene Columbus as Dancer (uncredited)

Darlene Conley as Sanitarium Nurse (uncredited)

Mason Curry as New Haven Hotel Waiter (uncredited)

Richard Dreyfuss as Assistant Stage Manager (uncredited)

Diana Eden as Dancer (uncredited)

Daniel Elam as Show Spectator (uncredited)

Ellaraino as Sanitarium Nurse (uncredited)

Richard Elmore as Pedestrian (uncredited)

Allen Emerson as Reporter (uncredited)

Tom Falk as Neely O'Hara's Stage Manager (uncredited)

Roy Fitzell as Choreographer (uncredited)

Gertrude Flynn as Ladies' Room Attendant (uncredited)

Jennifer Gan as Show Girl Actress (uncredited)

Jeanne Gerson as Neely O'Hara's Maid (uncredited)

Robert Gibbons as Desk Clerk at Lawrenceville Hotel (uncredited)

Joseph Glick as Pedestrian (uncredited)

George Golden as Restaurant Patron (uncredited)

Laurence Haddon as Frank (Blue Angel Nightclub Owner) (uncredited)

Paul Hahn as Captain of Waiters at Chasens (uncredited)

Marvin Hamlisch as Pianist (uncredited)

Ernest Harada as Lyon's Houseboy (uncredited)

Jonathan Hawke as Sanitarium Doctor (uncredited)

Shep Houghton as Restaurant Patron (uncredited)

Richard Hoyt as Reporter at Suicide (uncredited)

Kathryn Janssen as Party Guest (uncredited)

Michael Jeffers as Patient (uncredited)

Jason Johnson as Reporter (uncredited)

Maurice Kelly as Dance Director in Montage (uncredited)

Johnny Kern as Pedestrian (uncredited)

Charlotte Knight as Neely O'Hara's Maid (uncredited)

Ted Kristian as Nightclub Waiter (uncredited)

Richard LaMarr as Pedestrian (uncredited)

Louise Lane as Restaurant Patron (uncredited)

Ethelreda Leopold as Restaurant Patron (uncredited)

Gerry Lock as Sanitarium Nurse (uncredited)

Judith Lowry as Aunt Amy (uncredited)

Donna Mantoan as Sanitarium Girl (uncredited)

Mardie March as Reporter (uncredited)

John Marlin as Waiter (uncredited)

Marian Mason as Reporter (uncredited)

Bob McCord as Edward (Playhouse Bartender) (uncredited)

Leslie McRay as Ted's Girl (uncredited)

Ralph Montgomery as Bar Patron (uncredited)

Rex Moore as Restaurant Patron (uncredited)

Dorothy Neumann as Helen Lawson's Maid (uncredited)

William H. O'Brien as Bartender (uncredited)

Monty O'Grady as Restaurant Patron (uncredited)

Barry O'Hara as Assistant Stage Manager (uncredited)

Linda Peck as Telethon Telephone Girl (uncredited)

Thelma Pelish as Rehearsal Hall Receptionist (uncredited)

Gil Peterson as Neely's Leading Man (uncredited)

Don Pethley as Reporter (uncredited)

Paul Power as Waiter (uncredited)

Leona Powers as Woman at Martha Washington Hotel (uncredited)

Peggy Rea as Neely O'Hara's Vocal Coach (uncredited)

Jerry Rush as Restaurant Patron (uncredited)

Margaret Shinn as Nurse (uncredited)

June Smaney as Clerk (uncredited)

Eddie Smith as Reporter (uncredited)

Ted Stanhope as Maitre D' at Chasens (uncredited)

Harry Stanton as Jennifer's Date at the Blue Angel Nightclub (uncredited)

Joe Stefano as San Francisco Bartender (uncredited)

Margot Stevenson as Anne's Mother (uncredited)

Gail Stone as Autograph Seeker (uncredited)

Martin Strader as Pedestrian (uncredited)

Robert Street as Choreographer (uncredited)

Tim Taylor as Restaurant Patron (uncredited)

Raven Touchstone as Sanitarium Nurse (uncredited)

Corinna Tsopei as Telethon Telephone Girl (uncredited)

John Ward as Neely O'Hara's Psychiatrist (uncredited)

Darryl Wells as Willie (Anne's Boyfriend) (uncredited)

Louis Whitehill as Reporter (uncredited)

Patricia Winters as Redhead (uncredited)

William Wintersole as Tony's Doctor (uncredited)

Charles Woolf as Reporter (uncredited)