- Attended the University of Minnesota.
- Prolific American writer-producer, working with Cecil B. DeMille at Paramount (1918-19), at United Artists (1925-29) and as script supervisor for Universal (1930-31) and MGM (1931-33). A former newspaper reporter for the New York Evening Journal, he began in films with Thomas H. Ince, contributing scripts to many westerns starring William S. Hart. From 1915 to 1917, Sullivan was head of the scenario department of the New York Motion Picture Company/Triangle. As a writer, he was primarily known for big budget (often historically-based) melodramas, and films exploring social problems.
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