He was born in Budapest, Hungary, in 1952, and after four years at the Pannónia animation studios, fled to the West in 1975. While working in Sweden he met Arlene Klasky, an American-born animator. The two subsequently started their own company, Klasky Csupo, which produced many popular animated television shows. He was credited as "animation executive producer" and "supervising animation director" for several episodes of "The Simpsons" in the early seasons before the show switched over to Film Roman.