Animaniacs is a
cartoon from
Steven Spielberg/
Amblin Entertainment,
Warner Bros. and
Fox Television, the same group that brought you
Tiny Toon Adventures. Many of the people that worked on
TTA (Sherri Stoner, Tom Ruegger, Tress MacNeille, etc.) are working on Animaniacs.
Animaniacs first aired on Monday, Sept 13th 1993 on Fox in what used to be the Tiny Toon Adventures time-slot. Fox Television aired the first season of 65 episodes and the second "season" of 4 extra episodes on its affiliates from 1993-1995. The third season of new episodes, as well as reruns from the first two seasons, can now be seen on your favorite affiliate of The WB.
Source: alt.tv.animaniacs FAQ