David Shiner (Cat in the Hat), Kevin Chamberlin (Horton the Elephant), Andrew Keenan-Bolger (Jojo), Janine LaManna (Gertrude McFuzz), Michelle 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)