- Principal Prickly as The Lorax
- Vince as Young Once-ler
- TJ as Ted
- Spinelli as Ted's Mom
- Gretchen as Audrey
- Gus as Pipsqueak
- Dr. Benedict as Mr. O'Hare
- Mikey as Fat Bar-ba-loot
- Miss Finster as Once-ler's Mom
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