Mystic River is a American drama film directed, co-produced and scored by Clint Eastwood, starring Sean Penn, Tim Robbins, Kevin Bacon, Laurence Fishburne, Marcia Gay Harden, Laura Linney and Emmy Rossum. The film was written by Brian Helgeland, based on the novel by Dennis Lehane.

The film opened to widespread critical acclaim. It was nominated for six Academy Awards: Best Picture, Best Director, Best Actor, Best Adapted Screenplay, Best Supporting Actor, and Best Supporting Actress. Sean Penn won Best Actor and Tim Robbins won Best Supporting Actor.