Ronald Bronstein

Ronald Bronstein (born 1973 or 1974) is an American screenwriter, film editor, director and actor. He directed, wrote and edited the independent film Frownland (2007). He frequently collaborates with the Safdie brothers, notably co-writing and co-editing Good Time (2017), Uncut Gems (2019), and Marty Supreme (2025). For Marty Supreme, he was nominated for Best Picture, Best Original Screenplay, and Best Editing at the 98th Academy Awards. Bronstein grew up Jewish in Great Neck on the North Shore of Long Island. He described his family growing up as "functional and supportive." He attended NYU film school but dropped out. While working on his first feature, Bronstein worked as a projectionist at various art houses around New York City. He made his debut in 2007 with the film Frownland. He directed, wrote and edited the film.