Franklin Lacey (1917–1988) was an American playwright and screenwriter. He was best known for co-authoring the book for The Music Man (1957), together with his collaborator Meredith Willson, and later collaborating on the screenplay for the 1962 film version. Lacey shared a Tony Award for the book of the musical. One of his first major works was the play Pagan in the parlor in 1949; it was directed for the stage by Frankenstein director James Whale. He also wrote the screenplay for the film Rain for a Dusty Summer (1971), which starred Ernest Borgnine. He worked closely with the author Aldous Huxley on a musical version of his novel Brave new World but the project was eventually shelved.