Unfaithfully Yours is a 1984 American romantic comedy film directed by Howard Zieff, starring Dudley Moore and Nastassja Kinski and featuring Armand Assante and Albert Brooks.

The original music score is by Bill Conti and the song "Unfaithfully Yours (One Love)" was written for the film and performed by Stephen Bishop.

Claude Eastman is a composer and the conductor of a prestigious symphony who has recently married beautiful Daniella, a much younger woman.

Daniella is initially furious when she learns the truth - seemingly more because Claude believed she was unfaithful than because he planned to kill her - and leaves.

Cast notes: The project to remake Preston Sturges' 1948 film, which was an artistic success but not a financial one, was originally intended for Peter Sellers, before his death in 1980.