Ronald Francis Clements (born April 25, 1953) is an American animator, film director, screenwriter, and film producer. He often collaborates with fellow director John Musker. He is best known for writing and directing the Disney animated films The Great Mouse Detective (1986), The Little Mermaid (1989), Aladdin (1992), Hercules (1997), Treasure Planet (2002), The Princess and the Frog (2009), and Moana (2016).