He most recently served as story editor and co-executive producer on Kid Cosmic for Netflix and released his first original novel, The Horrible Bag of Terrible Things.
[1][2] After graduating from Illinois, Renzetti attended the animation program at Columbia College Chicago for one year, where he was a classmate of Genndy Tartakovsky.
[3] Renzetti has been writer, director, and storyboard artist for several Cartoon Network shows, including 2 Stupid Dogs, Dexter's Laboratory, The Powerpuff Girls, Samurai Jack, and Foster's Home for Imaginary Friends.
Renzetti has (co-)written four books based on various Disney properties, including Dipper's and Mabel's Guide to Mystery and Nonstop Fun!, the New York Times Bestseller Gravity Falls: Journal 3, DuckTales: Solving Mysteries and Rewriting History, and Onward: Quests Of Yore.
A new installment in The Horrible Series, The Twisted Tower of Endless Torment, is set to release in July 2024, with the third novel potentially already being in the works.