Suspiria is a 1977 Italian supernatural horror film directed by Dario Argento, who co-wrote the screenplay with Daria Nicolodi, partially based on Thomas De Quincey's 1845 essay Suspiria de Profundis. The film stars Jessica Harper as an American ballet student who transfers to a prestigious European dance academy but realizes, after a series of murders, that the school is a front for something sinister. It also features Stefania Casini, Flavio Bucci, Miguel Bosé, Alida Valli, Udo Kier, and Joan Bennett, in her final film role. The film is the first of the trilogy Argento refers to as The Three Mothers, which also comprises Inferno (1980) and The Mother of Tears (2007).