James Martin Lafferty (born July 25, 1985) is an American actor. He is best known for his role as Nathan Scott on The WB/CW television drama One Tree Hill. In addition to his role on the young adult drama, Lafferty is also known for his appearance as Justin in S. Darko, the 2009 sequel to the 2001 film Donnie Darko.
James Martin Lafferty was born on July 25, 1985, in Hemet, California, to parents Jeff and Angie Lafferty, who own a local construction company. He has a younger brother, actor Stuart Lafferty. Attending Hemet High School until 2003, Lafferty graduated and enrolled at California State University, Long Beach. At the age of eighteen, he moved to Wilmington, North Carolina, after he was cast as Nathan Scott on the teenage drama One Tree Hill on The WB.
In 2001, James Lafferty was cast in the short-lived television series Emeril, where he portrayed Emeril's son Justin. He has also made guest appearances on Once and Again, Get Real, and Boston Public. This was followed by his role as Steve Alford in the ESPN made-for-television movie A Season on the Brink, a basketball film about the 1985-1986 season of Indiana University's men's basketball team. It was based on the book by