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Eddie Albert as Narrator |
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Bob Holt as The Lorax / The Once-ler (voice) |
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Athena Lorde as Miss O'Schmunsler (voice) |
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Harlen Carraher as Boy (voice) |
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Scatman Crothers as Singer |
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Vivian Vance as Singer |
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Thurl Ravenscroft as Singer |
| Directing | Hawley Pratt | Director |
| Art | Chuck Jones | Storyboard Artist |
| Production | Friz Freleng | Producer |
| Production | David H. DePatie | Producer |
| Sound | Dean Elliott | Music |
| Production | Dr. Seuss | Producer |
| Art | Irv Spector | Storyboard Artist |
| Writing | Dr. Seuss | Writer |
| Writing | Dr. Seuss | Book |
