Creators Carlos Castellanos and Hector Cantz each got their cartooning starts early. Carlos began his career as an illustrator while still in college, while Hector created his first cartoon when he was 12. Carlos continues to do a variety of illustration work for national magazines, publishers, and ad agencies. He lives with his wife and two sons in West Palm Beach. Hector was a features editor at the Dallas Morning News before dedicating himself to Baldo full-time. He lives in Dallas with his wife and three children.