Repulsion is a 1965 British psychological horror film directed by Roman Polanski, and starring Catherine Deneuve, Ian Hendry, John Fraser and Yvonne Furneaux. The screenplay was based on a scenario by Gerard Brach and Polanski. The plot focuses on a young woman who is left alone by her vacationing sister at their apartment, and begins reliving traumas of her past in horrific ways. Shot in London, it was Polanski's first English-language film and second feature length production, following Knife in the Water (1962).
The film debuted at the 1965 Cannes Film Festival before receiving theatrical releases internationally. Upon its release, Repulsion received considerable critical acclaim and currently is considered one of Polanski's greatest movies. It was the first installment in Polanski's "Apartment Trilogy", followed by Rosemary's Baby (1968) and The Tenant (1976), both of which are also horror films that take place primarily inside apartment buildings. The film was nominated for a BAFTA Award for Gilbert Taylor's cinematography.