Who choreographed On the Twentieth Century?

On the Twentieth Century is a musical with book and lyrics by Betty Comden and Adolph Green and music by Cy Coleman. Based partly on the 1932 play Twentieth Century and its 1934 film adaptation, the musical is part operetta, part farce and part screwball comedy. The story involves the behind-the-scenes relationship between Lily, a temperamental actress and Oscar, a bankrupt theatre producer. On a luxury train traveling from Chicago to New York in the early 1930s, Oscar tries to cajole the glamorous Hollywood star into playing the lead in his new, but not-yet-written drama, and perhaps to rekindle their romance.

The musical ran on Broadway in 1978–1979, running for 449 performances and winning five Tony Awards. It showcased Madeline Kahn in the role of Lily Garland, and when Kahn left the show, the role launched the career of Judy Kaye. Several revivals followed in London and elsewhere, and a 2015 Broadway revival featured Kristin Chenoweth and Peter Gallagher.