Justin Haythe (born September 16, 1973) is an American novelist, short story writer, and screenwriter.
Born in London, Haythe is a graduate of The American School in London and Middlebury College. He earned his MFA from Sarah Lawrence College. His debut novel, The Honeymoon, was nominated for the 2004 Man Booker Prize. He wrote The Clearing directed by Pieter Jan Brugge, starring Helen Mirren and Robert Redford. His adaptation of Revolutionary Road was released in December 2008, and was nominated for a USC Scripter Award as well as a BAFTA for best adapted screenplay. Most recently, he worked on the 2013 action films Snitch and The Lone Ranger.
Haythe lives in New York City, United States.