Martin Compston is a Scottish actor best known for his role as Detective Inspector Steve Arnott in the popular television series Line of Duty. Born on May 8, 1984, in Greenock, Scotland, he began his career in acting after being discovered while working as a carpenter. In addition to Line of Duty, Compston has appeared in various films and television shows, including The Damned United and Our House. He has received critical acclaim for his performances and has become a prominent figure in British television and film.