Unfaithful is a 2002 erotic thriller film directed and produced by Adrian Lyne and starring Richard Gere, Diane Lane, Olivier Martinez, Erik Per Sullivan, Chad Lowe, and Dominic Chianese. It was adapted by Alvin Sargent and William Broyles Jr. from the 1969 French film The Unfaithful Wife by Claude Chabrol. It tells the story of a couple living in the suburbs of New York City whose marriage goes dangerously awry when the wife indulges in an affair with a stranger she encounters by chance.

Richard Tiffany Gere is an American actor. He began appearing in films in the 1970s, playing a supporting role in Looking for Mr. Goodbar (1977) and a starring role in Days of Heaven (1978). He came to prominence with his role in the film American Gigolo (1980), which established him as a leading man and a sex symbol. His other films include An Officer and a Gentleman (1982), The Cotton Club (1984), No Mercy (1986), Pretty Woman (1990), Sommersby (1993), Intersection (1994), First Knight (1995), Primal Fear (1996), Runaway Bride (1999), Dr. T & the Women (2000), Shall We Dance? (2004), I'm Not There (2007), Arbitrage (2012) and Norman (2016). For portraying Billy Flynn in the musical Chicago (2002), he won a Golden Globe Award.