- Theodore Roosevelt as The Lorax
- Larry Daley as Once-ler
- Nicky Daley as Young Once-ler
- Ahkmenrah as Ted
- Sacagawea as Ted's Mom
- Madeline Phelps as Audrey
- Dexter as Pipsqueak
- Mindy as Grammy Norma
- Lancelot as Mr. O'Hare
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