Sydney James Harcourt made his Broadway debut in the 2001 revival of the 1956 Comden and Green musical Bells Are Ringing. Since then, he has appeared in American Idiot, the original Broadway company of Hamilton and now, Cats: The Jellicle Ball. His debut, a traditional revival of a classic musical, is in stark contrast to the rest of his résumé. With its fresh take on the feline phenomenon, The Jellicle Ball …