Supergirl is a 1984 superhero film directed by Jeannot Szwarc from a screenplay by David Odell based on the DC Comics character of the same name. It is the fourth film in the Superman film series, set after the events of Superman III (1983) and serving as a spin-off of the series. The film stars Helen Slater as Supergirl, along with Faye Dunaway, Hart Bochner, Peter Cook, Mia Farrow, Brenda Vaccaro, and Peter O'Toole, with Marc McClure reprising his role as Jimmy Olsen from the Superman films.

A superhero film is a film that focuses on superheroes and their actions. Superheroes are individuals who usually possess superhuman abilities and are dedicated to protecting the public. These films typically feature action, adventure, fantasy, or science fiction elements. The first film about a particular character often focuses on the hero's origin story. It also frequently introduces the hero's nemesis.