 | Bette Davis als Baby Jane Hudson |
 | Joan Crawford als Blanche Hudson |
 | Victor Buono als Edwin Flagg |
 | Wesley Addy als Marty McDonald |
 | Julie Allred als Baby Jane Hudson in 1917 |
 | Anne Barton als Cora Hudson |
 | Marjorie Bennett als Dehlia Flagg |
 | Bert Freed als Ben Golden |
 | Anna Lee als Mrs. Bates |
 | Maidie Norman als Elvira Stitt |
 | Dave Willock als Ray Hudson |
| William Aldrich als Lunch Counter Assistant at Beach |
| Ernest Anderson als Ernie, Ice Cream Vendor at Beach (uncredited) |
 | Russ Conway als Police Officer |
 | Maxine Cooper als Bank Teller |
 | Robert Cornthwaite als Dr. Shelby |
 | Michael Fox als Man in Television Commercial |
 | Gina Gillespie als Blanche Hudson in 1917 |
 | Barbara Merrill als Liza Bates |
 | Don Ross als Police Officer |
 | James Seay als Police Officer |
| John Shay als Police Officer |
 | Jon Shepodd als Police Officer |
 | Peter Virgo als Police Officer |
 | Bobs Watson als Clerk in Newspaper Classified Ad Department |
| Debbie Burton als Singing Voice (voice) |
 | Murray Alper als Projectionist (uncredited) |
 | Steve Condit als Boy in Audience (uncredited) |
 | Dorothea Lord als Nurse (uncredited) |
| Norman Papson als Beach Boy (uncredited) |
 | Mike Ragan als Police Officer (uncredited) |
| Sammy Shack als Theatre Patron (uncredited) |
 | Michael St. Angel als Bank Manager (uncredited) |
| Jack Tornek als Man Buying Newspaper (uncredited) |
| Ralph Volkie als Assistant Projectionist (uncredited) |
| Robert Perry als Dancer (uncredited) |
 | Bill Walker als Deliveryman (uncredited) |
 | Ralph Hart als Small Boy |
| Frank De Vol | Original Music Composer |
| Henry Farrell | Novel |
| Lukas Heller | Screenplay |
| Robert Aldrich | Producer |
| Kenneth Hyman | Executive Producer |
| Michael Luciano | Editor |
| Ruby Raksin | Additional Music |
| Sidney Cutner | Additional Music |
| Ernest Haller | Director of Photography |
| Robert Aldrich | Director |
| Beau Wilson | Key Makeup Artist |
| Donald Steward | Special Effects |
| Jack Murton | Casting |
| Harold E. McGhan | Sound Editor |
| Monty Westmore | Makeup Artist |
| Tom Connors Jr. | Assistant Director |
| George Sawley | Set Decoration |
| Alex Romero | Choreographer |
| William Glasgow | Art Direction |
| George E. Marsh | Music Editor |
| Jack Obringer | Makeup Artist |
| Robert Gary | Script Supervisor |
| Jack R. Berne | Production Supervisor |
| Till A. Gabbani | Camera Operator |
| Nick Archer | Assistant Editor |
| Robert J. Schiffer | Makeup Artist |
| Adell Aldrich | Other |
| Jack Solomon | Sound |
| Robert Sherman | Dialogue Editor |
| Kathleen McCandless | Costumer |
| Phil Stern | Still Photographer |
| Albert Woodbury | Orchestrator |
| William Aldrich | Third Assistant Director |
| Don Christie | Still Photographer |
| Eric Seelig | Costumer |
| Michael Andersen | Additional Music |
| Angela Alexander | Costumer |
| Richard Borland | Grip |
| Norma Koch | Costume Designer |
| Walter Blake | Producer's Assistant |
| Vou Lee Giokaris | Costumer |
| Carol Daniels | Stunts |
| Peggy Shannon | Hairstylist |
| George F. Marni | Music Editor |
| John Orlando | Props |
| Bette Davis | Makeup Artist |
