Shutter Island is a 2010 American neo-noir psychological horror film directed by Martin Scorsese. It is adapted by Laeta Kalogridis from the 2003 novel of the same name by Dennis Lehane, about a Deputy U.S. Marshal who comes to Shutter Island to investigate a psychiatric facility after one of the patients goes missing. It stars Leonardo DiCaprio and Mark Ruffalo, with Ben Kingsley, Max von Sydow and Michelle Williams in supporting roles.

The film had its wide release on February 19, 2010 and received generally positive reviews from critics. It was chosen by the National Board of Review as one of the top ten films of 2010, and grossed $295 million worldwide. The film is also noted for its soundtrack, which prominently used classical music, such as that of Gustav Mahler, Krzysztof Penderecki, György Ligeti, John Cage, Ingram Marshall, and Max Richter.