Stephen Keith Kloves (born March 18, 1960) is an American screenwriter, director, and producer. He wrote and directed the film The Fabulous Baker Boys and is mainly known for his screenplay adaptations of novels, especially for all but one of the Harry Potter films (the exception being The Order of the Phoenix) and for Wonder Boys, for which he was nominated for the Academy Award for Best Adapted Screenplay.

Kloves, born in Austin, Texas, grew up in Sunnyvale, California, where he graduated from Fremont High School. He attended the University of California, Los Angeles, but dropped out when he was not admitted into the film school in his third year.