Steven Knight is a British screenwriter, film and television producer and director. Knight wrote the screenplays for the films Closed Circuit, Dirty Pretty Things, and Eastern Promises, and also wrote and directed the films Locke and Hummingbird.

Closed Circuit is a 2013 political thriller drama film directed by John Crowley and written by Steven Knight, released on August 28, 2013. The film stars Eric Bana, Rebecca Hall, Ciarán Hinds, Jim Broadbent, and Riz Ahmed.