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Robert John Renzetti is an American animator and author. Renzetti is known for creating My Life as a Teenage Robot and the Oh Yeah! Cartoons series Mina and the Count for Nickelodeon, directing Dexter's Laboratory, The Powerpuff Girls, and Samurai Jack for Cartoon Network and serving as the animation director of Sym-Bionic Titan. He was also the supervising producer on the Disney Channel animated television series Gravity Falls and an executive producer on Big City Greens. He most recently served as story editor and co-executive producer on Kid Cosmic for Netflix and is currently writing his first original novel entitled The Horrible Bag of Terrible Things to be published by Penguin Workshop, an imprint of Penguin Random House.