- Papa Mousekewitz as the Lorax
- Tony as the Once-ler
- Fievel as Pipsqueak
- Tiger as Ted Wiggins
- Tanya as Audrey
- Grasping as O'Hare
- Mama Mousekewitz as Ted's Mom
- Ellie (Ice Age) as Grammy Norma
- Cousin Fred (The Berenstain Bears) as Lou the Barbaloot
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