The main cast of the 1962 film What Ever Happened to Baby Jane? includes:
- Bette Davis as Jane Hudson
- Joan Crawford as Blanche Hudson
- Victor Buono as Edwin Flagg
- Wesley Addy as Marty McDonald
- Anne Barton (credited as Ann Barton) as Cora Hudson
- Maidie Norman as Elvira Stitt
- Gina Gillespie as 13-year-old Blanche
- Julie Allred as 9-year-old Jane
- Debbie Burton as young Jane's singing voice
Additional supporting roles include actors such as Marjorie Bennett, Bert Freed, Anna Lee, Dave Willock, and Robert Cornthwaite among others
. There is also a 1991 made-for-television adaptation starring real-life sisters Lynn Redgrave as Baby Jane Hudson and Vanessa Redgrave as Blanche Hudson, but the original and most famous cast remains the 1962 film's ensemble led by Davis and Crawford
