While not the first adaptation of one of the author's novels, American Psycho certainly remains the most popular Bret Easton Ellis-based movie. After 25 years and numerous rewatches later, it's easy to see why. Ellis' work first made its way to the screen with the Robert Downey Jr.-starring Less Than Zero, an underrated gem tackling similar themes to Psycho, and later continued with 2002's The Rules of Attraction, which is technically connected to the Christian Bale-led movie, and 2008's The Informers.

Based on the book of the same name by Bret Easton Ellis, American Psycho follows Patrick Bateman (Christian Bale) an investment banker in New York in 1987 who leads a double life as a serial killer. As investigators circle Bateman after the disappearance of a colleague, he finds himself trapped in a spiral of murder and excess, unable to stop himself from giving in to his increasingly dark urges.