James Dalton Trumbo (December 9, 1905 – September 10, 1976) was an American screenwriter who scripted many award-winning films, including Thirty Seconds Over Tokyo (1944), Roman Holiday (1953), Spartacus (1960), and Exodus (1960). One of the Hollywood Ten, he refused to testify before the House Un-American Activities Committee (HUAC) in 1947 during the committee's investigation of Communist influences in the motion picture industry.