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Ross Bagdasarian, Jr. as Alvin / Simon / David Seville (voice) |
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Janice Karman as Theodore / Tommy's Sister (voice) |
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Frank Welker as Santa Claus / Doctor (voice) |
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Charles Berendt as Clyde Crashcup (voice) |
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R.J. Williams as Tommy Waterford (voice) |
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June Foray as Mrs. Waterford / Mrs. Claus |
| Writing | Janice Karman | Writer |
| Writing | Ross Bagdasarian, Jr. | Writer |
| Directing | Phil Monroe | Director |
| Writing | Hal Mason | Story |
| Art | Toby Bluth | Background Designer |
| Art | Toby Bluth | Production Design |
| Visual Effects | Chuck Jones | Character Designer |
| Crew | Chris Caswell | Compositor |
