David Shiner (Cat in the Hat), Kevin Chamberlin (Horton the Elephant), Anthony Blair Hall (Jojo), Janine LaManna (Gertrude McFuzz), Michele Pawk (Mayzie La Bird), Sharon Wilkins (The Sour Kangaroo), Stuart Zagnit (The Mayor), Alice Playten (The Mayor's Wife/The Lorax), Eddie Korbich (Grandpa Who/Ensemble)