Prizzi's Honor (1985)

Adapted from Richard Condon's novel, the film stars Nicholson as a none-too-bright hit man for a Mafia family who falls in love with an independent operator--a female killer played by Kathleen Turner. The two make a surprisingly funny couple, whether taking a fling at domesticity or comparing professional notes. But their romance is threatened by the woman Nicholson has jilted: the don's daughter, played by Anjelica Huston in a particularly well-etched and poisonous portrayal.