The Cast are
- Major Monogram as The Lorax
- Carl as Once-ler
- Phineas as Ted
- Linda as Ted's Mother
- Isabella as Audrey
- Ferb as Pipsqueak
- Betty as Ted's Grandma
- Dr. Doofenshmirtz as Mr. O'Hare
- ? as The Once-ler's Brothers
- Guest star: Balthazaar Horowitz as Ned McDodd from Horton Hears a Who!
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