American Psycho is a 2000 satirical horror film directed by Mary Harron, who co-wrote the screenplay with Guinevere Turner. Based on the 1991 novel by Bret Easton Ellis, it stars Christian Bale as Patrick Bateman, a New York City investment banker who leads a double life as a serial killer alongside an ensemble cast of Willem Dafoe, Jared Leto, Josh Lucas, Chloë Sevigny, Samantha Mathis, Cara Seymour, Justin Theroux, and Reese Witherspoon.
