- HD 1080
- Runtime: 135m.
- Status: Released
- 2
- Languages: en
- Country: United States of America
- Director: Robert Aldrich
- Stars: Bette Davis, Joan Crawford, Victor Buono, Wesley Addy, Julie Allred
- keywords: beach, sibling relationship, based on novel or book, insanity, wheelchair, sister, aging, alcoholism, murder, hollywood, mental illness, invalid, former child star, ice cream, vaudeville, recluse, drunkenness, spinsters, old mansion, piano, sister sister relationship, hagsploitation, psycho-biddy
- Production_studio: The Associates & Aldrich Company
- Slogan: Sister Sister, Oh So Fair! Why Is There Blood All Over Your Hair?
- The What Ever Happened to Baby Jane? is featured in the top rankings of 1962
- #7 in Top Drama Movies of 1962
- #1 in Top Thriller Movies of 1962
- #1 in Top Horror Movies of 1962
A former child star torments her paraplegic sister in their decaying Hollywood mansion.