John R. Dilworth
John Russell Dilworth (born February 14, 1970), is an American animator, character designer, storyboard artist, actor, director, writer, and producer. He is known for being the creator of the adult animated television sitcom Mark's World (2009-present). He also worked on the original opening for Nicktoons and for shows such as Dexter's Laboratory, The Powerpuff Girls, Samurai Jack and My Life as a Teenage Robot, as well as the Kids' WB television series Johnny Test and The X-Presidents segments for NBC television series Saturday Night Live.