Stephen Sinclair is a New Zealand film and television writer and emerging director.
As a screenwriter, Sinclair has worked with director Peter Jackson on Meet the Feebles, Braindead and The Lord of the Rings: The Two Towers. He has directed several short films, including Home Video and Ride, which was selected for the Montreal Film Festival in 2004. He has just made his feature film directorial debut, with the drama-comedy Russian Snark, which was written for Stephen Papps and Elena Stejko.
He is a son of poet and noted historian Sir Keith Sinclair and brother of the actor Harry Sinclair.