Tress MacNeille.
Tress MacNeille is a professional voice actress who provided Terry and Oblivia's voice in the cancelled TV show.
MacNeille is well-known in the entertainment industry and has contributed to a large collection of movies, shows, and video games. One of her biggest talents is imitating voices, which earned her multiple (Disney) roles that were originally performed by different people.
Some of her most notable roles are Disney's Daisy Duck and Chip, Gadget from Resque Rangers, Babs Bunny from Tiny Toons Adventures, Dot and Hello Nurse from Animaniacs, "Mom" from Futurama, Charlotte Pickles from Rugrats (1991), Hoodsey from As Told by Ginger, Anastasia Tremaine in Cinderella 2 and 3, and multiple Disney characters in some Disney-themed video games, including the Kingdom Hearts series.