Les Diaboliques is a 1955 black and white French suspense film directed by Henri-Georges Clouzot, starring Simone Signoret and Véra Clouzot. The story blends elements of thriller and horror, with the plot focusing on a woman and her husband's mistress who conspire to murder the man; after the crime is committed, however, his body disappears, and a number of strange occurrences ensue.
The title literally translates from French to English as 'The Devils'. It was called The Fiends when released in the UK, while the US release is entitled Diabolique. It is based on the novel Celle qui n'était plus (She Who Was No More) by Pierre Boileau and Thomas Narcejac.
Now considered a classic of the horror genre and film in general, Les Diaboliques ranked #49 on Bravo's 100 Scariest Movie Moments.