Hush...Hush, Sweet Charlotte was released on 16 December 1964.
After the surprise success of What Ever Happened to Baby Jane? (1962), Robert Aldrich was eager to follow up and decided to repeat with much of the same cast, on a story by the same author (Henry Farrell), same screenwriter (Lukas Heller), and some of the same crew.
Aldrich had envisioned the two stars, Joan Crawford and Bette Davis switching the roles from Baby Jane (with Crawford as the devious one and Davis as the innocent).
Problems, however, began almost immediately. Aldrich was unhappy with Heller's script and brought on Farrell to rewrite it. Davis was sued by Paramount Pictures to finish Where Love Has Gone and filming had to be halted until the matter was resolved. Crawford had to be hospitalized for a respiratory ailment, and when her recovery took longer than anticipated, the studio's insurance company demanded that she be replaced. Aldrich flew to Switzerland to ask Olivia de Havilland to take over. She hated the script, hated to leave Switzerland, but agreed to do it for Bette Davis (she later said she regretted the decision).
Despite mixed reviews, the film was a commercial success, and ended up with 7 Academy Award nominations, including Best Supporting Actress (Agnes Moorehead), Best Cinematography - Black and White (Joseph Biroc), Best Editing (Michael Luciano), and Best Song. It did not receive an Oscar.