On October 22, 2007, "Daily Variety" reported that Scorsese would reunite with Leonardo DiCaprio on a fourth picture, "Shutter Island". Principal photography on the Laeta Kalogridis screenplay, based on the novel of the same name by Dennis Lehane, began in Massachusetts in March 2008. In December 2007, actors Mark Ruffalo, Max von Sydow, Ben Kingsley, and Michelle Williams joined the cast, marking the first time these actors had worked with Scorsese. The film was released on February 19, 2010. On May 20, 2010, the film became Scorsese's highest-grossing film. In 2010, "The Wall Street Journal" reported that Scorsese was supporting the David Lynch Foundation's initiative to help 10,000 military veterans overcome posttraumatic stress disorder through Transcendental Meditation; Scorsese has publicly discussed his own practice of TM.