Serenity is a 2019 American neo-noir thriller film written, produced and directed by Steven Knight. The film stars Matthew McConaughey, Anne Hathaway, Diane Lane, Jason Clarke, Djimon Hounsou, and Jeremy Strong, and follows a fishing boat captain who is approached by his ex-wife to murder her abusive new husband. First announced in January 2017, principal photography on the film began on the Island of Mauritius that July.