Stars Who Were on 'MADtv' This list features performers who gained early sketch comedy experience on the rival show to SNL, MADtv, before achieving major success in film, television, and stand up. Star Stuart is one of the most recognizable recurring characters from MADtv, portrayed by Michael McDonald during the late 1990s and early 2000s. The character is a young, overly energetic boy known for My favorite detail from Toy Story, this inappropriate toy : r MovieDetails Now 55, Alex Borstein remains one of comedy's sharpest voices. From MADtv sketches to unforgettable characters, timing defines every scene. On The Marvelous Mrs. Maisel, Susie Myerson became a modern TV icon.