Geoffrey Johnson , whose Johnson-Liff Casting was behind the roles for Cats, Les Miserables, and Phantom of the Opera, Broadway’s three longest-running shows, died Friday, Nov. 26. He was 91 and passed from respiratory failure at Henry J. Carter Hospital in New York. Johnson’s log career saw him appear on Broadway as an actor. He also worked with David Merrick as a stage manager and casting director and served as Noël Coward’s US representative. Born in New York City on June 23, 1930, and raised in Larchmont NY, he received a BA from the University of Pennsylvania and an MFA from the Yale School of Drama. From there, he worked as an actor, appearing in Saint Joan on Broadway in 1956, He was also the stage manager of several Broadway shows including Cactus Flower and I Do, I Do . His work as a stage manager led him to Noël Coward, with whom he worked on the Broadway production of Sail Away . The relationship continued after that, with Johnson serving …