Superman is a 1978 superhero film based on the DC Comics superhero Superman, played by Christopher Reeve. It is the first of four installments in the Superman film series starring Reeve as Superman. The film was directed by Richard Donner based on a screenplay by Mario Puzo, David Newman, Leslie Newman, and Robert Benton. In addition to Reeve, the film features an ensemble cast including Marlon Brando, Gene Hackman, Jeff East, Margot Kidder, Glenn Ford, Phyllis Thaxter, Jackie Cooper, Trevor Howard, Marc McClure, Terence Stamp, Valerie Perrine, Ned Beatty, Jack O'Halloran, Maria Schell, and Sarah Douglas. It depicts the origin of Superman, including his infancy as Kal-El of Krypton, son of Jor-El (Brando), and his youthful years in the rural town of Smallville. Disguised as reporter Clark Kent, he adopts a mild-mannered disposition in Metropolis and develops a romance with Lois Lane (Kidder) while battling the villainous Lex Luthor (Hackman).

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.