Carl Harvey "C.H." Greenblatt (born June 17, 1972) is an American screenwriter, producer, storyboard artist, cartoonist, animator, and voice actor. He has worked on Nickelodeon's SpongeBob SquarePants, and on Cartoon Network's The Grim Adventures of Billy & Mandy and Evil Con Carne. He is the creator of Cartoon Network's Chowder, Nickelodeon's Harvey Beaks, and creator and executive producer of Jellystone!, a new Hanna-Barbera animated series for HBO Max produced by Warner Bros. Animation