THE GREATEST SHOWMAN Trailer Debut Experience the first THE GREATEST SHOWMAN trailer! The film, directed by Michael Gracey, stars Hugh Jackman, Zendaya, Rebecca Ferguson, Zac Efron, and Michelle Williams. THE GREATEST SHOWMAN will be released in theaters on December 25. Inspired by the imagination of P.T. Barnum, The Greatest Showman is an original musical that celebrates the birth of show business and tells of a visionary who rose from nothing to create a spectacle that became a worldwide sensation.