From Wikipedia, the free encyclopedia David Harold Franzoni (born March 4, 1947) is an American screenwriter. His best known screenplays include King Arthur, Gladiator, Amistad, and Jumpin' Jack Flash. Franzoni has close connections with both DreamWorks Pictures and Steven Spielberg. When he graduated from the University of Vermont in the 1970s he took a motorcycle trip across the world, going from New York, to Europe to the Middle East, South Asia, Australia, and South America. He is a fan a ...