A former child star torments her paraplegic sister in their decaying Hollywood mansion.
You can now watch What Ever Happened to Baby Jane? online on the following streaming providers in the United States.
| Writing | Lukas Heller | Screenplay |
| Crew | Ruby Raksin | Additional Music |
| Writing | Henry Farrell | Novel |
| Editing | Michael Luciano | Editor |
| Crew | Sidney Cutner | Additional Music |
| Directing | Robert Aldrich | Director |
| Camera | Ernest Haller | Director of Photography |
| Production | Robert Aldrich | Producer |
| Production | Kenneth Hyman | Executive Producer |
| Sound | Frank De Vol | Original Music Composer |
| Directing | Tom Connors Jr. | Assistant Director |
| Sound | Harold E. McGhan | Sound Editor |
| Editing | Nick Archer | Assistant Editor |
| Sound | George E. Marsh | Music Editor |
| Costume & Make-Up | Jack Obringer | Makeup Artist |
| Directing | Robert Gary | Script Supervisor |
| Crew | Donald Steward | Special Effects |
| Camera | Till A. Gabbani | Camera Operator |
| Production | Jack Murton | Casting |
| Costume & Make-Up | Robert J. Schiffer | Makeup Artist |
| Costume & Make-Up | Monty Westmore | Makeup Artist |
| Crew | Alex Romero | Choreographer |
| Art | William Glasgow | Art Direction |
| Costume & Make-Up | Beau Wilson | Key Makeup Artist |
| Art | George Sawley | Set Decoration |
| Production | Jack R. Berne | Production Supervisor |
| Directing | Adell Aldrich | Other |
| Sound | Jack Solomon | Sound |
| Sound | Robert Sherman | Dialogue Editor |
| Costume & Make-Up | Norma Koch | Costume Designer |
| Camera | Richard Borland | Grip |
| Camera | Phil Stern | Still Photographer |
| Sound | Albert Woodbury | Orchestrator |
| Art | John Orlando | Props |
| Sound | George F. Marni | Music Editor |
| Costume & Make-Up | Kathleen McCandless | Costumer |
| Directing | William Aldrich | Third Assistant Director |
| Crew | Michael Andersen | Additional Music |
| Camera | Don Christie | Still Photographer |
| Costume & Make-Up | Eric Seelig | Costumer |
| Crew | Carol Daniels | Stunts |
| Costume & Make-Up | Peggy Shannon | Hairstylist |
| Production | Walter Blake | Producer's Assistant |
| Costume & Make-Up | Angela Alexander | Costumer |
| Costume & Make-Up | Vou Lee Giokaris | Costumer |
| Costume & Make-Up | Bette Davis | Makeup Artist |
