by Michael Bell) is Tommy and Dil's maternal grandfather, Didi's father Boris is a Russian-Jewish immigrant to the United States. Minka Kerpackter (voiced by Melanie Chartoff) is Boris's wife, Didi's mother and Tommy and Dil's grandmother. She is also a Russian-Jewish immigrant, but never seen in the series and will remain mentioned. Estes Pangborn (voiced by Clancy Brown) is the vice-principal of the kids' school. A former pro wrestler whom the gang often run afoul of, although he likes poetry which shows his sensitive side. Miss O'Keats (voiced by Ann Magnuson) is a troubled romantic; she is a teacher at the kids' school who later dates vice-principal Pangborn. Development and production All Growed Up The idea for All Grown Up! originated in "All Growed Up", a television special which aired in 2001 to celebrate the 10th anniversary of Rugrats and portrayed the original characters 10 years into the future. The special was nominated for "Outstanding Children's Program" in the 2002 Creative Arts Emmy Awards. The special was the highest rated Rugrats episode, the highest-rated Nickelodeon program, and cable's #1 show for the week ending July 22, 2001, with a 7.2 rating equivalent to 12 million viewers. Approximately 70% of all kids aged 2–11 tuned in to watch the special. Nickelodeon president, Herb Scannell, noted that a "Surprising numbers of kids held Rugrats parties on Saturday night and watched the show in groups". The following day, Nickelodeon said "'We've got to make this a show,' because of the size of the audience that came to it." Noting the immediate popularity of the show's concept, "All Growed Up" was deemed the network's equivalent of the Super Bowl. Nickelodeon made a two-season order of 35 episodes. Nick's press releases for the Rugrats' 10th anniversary noted that the "All Growed Up" special was a "one time only" special. Nickelodeon was so impressed by the high ratings, they wanted to use the show as a pilot for either a regular spinoff series or a series of occasional one-hour specials. Nickelodeon decided to commission an entire series around the teenage main characters. Arlene Klasky explained "It got enormous ratings, so Nickelodeon blessed us with another series". Margie Cohn felt that Rugrats had endured prolonged success due to the "series' writing, and the appeal of the show's well developed characters to its deeply devoted audience", and argued the sequel resulted from fan support and speculation on how