Kratz has also dubbed roles in the Creature Shop effect movies The Flintstones in Viva Rock Vegas, Stuart Little 2 (as Falcon), and Dr. Dolittle (as Dr. John Dolittle and a rat). Kratz graduated from an acting school in Stockholm in 1989, initially playing gentle types. That quickly changed, due to his appearance and style of acting, and now he often portrays more sinister types on stage.