Robert "Rob" Renzetti (born 1967) is an American animator and director who created the animated television series My Life as a Teenage Robot for Nickelodeon, and directed Dexter's Laboratory, The Powerpuff Girls, & Samurai Jack for Cartoon Network. He has also served as story editor for the first two seasons of My Little Pony: Friendship Is Magic, and was supervising producer on the Disney Channel animated series Gravity Falls.
After graduating from the California Institute of the Arts, Renzetti began his animating career in Spain, working on 5 episodes for Batman: The Animated Series.
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. During the mid-1990s, he created Mina and the Count, a series of animated shorts that premiered on the What-a-Cartoon show then later aired for a short time on the similar anthology series Oh Yeah! Cartoons. In 1999, he made the short My Neighbor Was a Teenage Robot, which also debuted on Oh Yeah! Cartoons; in 2003, My Life as a Teenage Robot, based on the short, debuted on Nickelodeon. In April 2008, he started work on Cartoon Network's "Cartoonstitute" project as supervising producer.
He was story editor on My Little Pony: Friendship Is Magic for the series' first two seasons, but left in 2011, soon after the departure of the series showrunner, Lauren Faust, to work as the supervising producer on Disney's Gravity Falls. He is now working on Disney's Country Club as Executive Producer and writing an upcoming book for the DuckTales reboot.