What Ever Happened to Baby Jane? is an American psychological horror novel by Henry Farrell published in 1960 by Rinehart & Company. The novel has earned a cult following, and has been adapted for the screen twice, in 1962 and 1991.

What Ever Happened to Baby Jane? is a 1962 American psychological horror thriller film directed and produced by Robert Aldrich, from a screenplay by Lukas Heller, based on the 1960 novel of the same name by Henry Farrell. The film stars Bette Davis and Joan Crawford, and features the major film debut of Victor Buono. It follows an aging former child star tormenting her paraplegic sister, a former film star, in an old Hollywood mansion.