John Semper, Jr. is a screenwriter, producer and story editor with numerous credits in animation for television. He has worked for such diverse companies as Disney Studios, Warner Bros. Animation and Hanna-Barbera Productions during a career which has involved the development of projects for Jim Henson, George Lucas, Stan Lee, Rob Minkoff and others. Semper created the English-language dialogue for two of Hayao Miyazaki's acclaimed animated features, Laputa: Castle in the Sky and Kiki's Delivery Service, and co-wrote the screenplay for the live-action comedy, Class Act. During the 1990s, Semper was producer/story editor of Spider-Man: The Animated Series. which ran from 1994 to 1998.