Supergirl is a 1984 British superhero film directed by Jeannot Szwarc and written by David Odell, based on the DC Comics character of the same name and serves as a spin-off to Alexander and Ilya Salkind's Superman film series. The film stars Faye Dunaway, Helen Slater as Supergirl, and Peter O'Toole, with Marc McClure reprising his role as Jimmy Olsen from the Superman films. He was the only actor to do so.
The film was released in the United Kingdom on July 19, 1984 and failed to impress critics and audiences alike. Dunaway and O'Toole earned Golden Raspberry Award nominations for Worst Actress and Worst Actor, respectively. However, Slater was nominated for a Saturn Award for Best Actress. The film's failure ultimately led the Salkinds to sell the Superman rights to Cannon Films in 1986.
The first DVD release was by the independent home video company Anchor Bay Entertainment in 2000, under license from StudioCanal. Warner Bros. acquired the rights to the film and reissued it on DVD late in 2006 to coincide with the release of Superman Returns. Although it is canon with the Christopher Reeve Superman films, it is not included in any of the Superman DVD or Blu-ray box sets by Warner Bros.
A book adaptation of the film was written by Norma Fox Mazer and this was released in paperback form in 1984.