Mystic River is a 2003 American neo-noir mystery drama film directed and scored by Clint Eastwood. It stars Sean Penn, Tim Robbins, Kevin Bacon, Laurence Fishburne, Marcia Gay Harden, and Laura Linney. The screenplay, written by Brian Helgeland, was based on the novel of the same name by Dennis Lehane. The film was produced by Robert Lorenz, Judie G. Hoyt, and Eastwood. It is the first film in which Eastwood was credited as composer of the score.