Steven Spielberg Presents Animaniacs, usually referred to as Animaniacs, is an American animated series, distributed by Warner Bros. Television and produced by Amblin Entertainment and Warner Bros. Animation. The cartoon was the second animated series produced by the collaboration of Steven Spielberg and Warner Bros. Animation during the animation renaissance of the late 1980s and early 1990s. The studio's first series, Tiny Toon Adventures, was a success among younger viewers, and attracted a sizable number of adult viewers. A major precedent for the series was the success of Who Framed Roger Rabbit, which featured appearances by many of its famous cartoon characters, and was co-produced by Amblin Entertainment. The Animaniacs writers and animators, led by senior producer Tom Ruegger, used the experience gained from the previous series to create new animated characters that were cast in the mold of Chuck Jones and Tex Avery's creations
Source: Wikipedia, "Animaniacs," available under the CC-BY-SA License.