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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 |
| Directing | Phil Monroe | Director |
| Writing | Janice Karman | Writer |
| Writing | Ross Bagdasarian Jr. | Writer |
| Art | Toby Bluth | Background Designer |
| Art | Toby Bluth | Production Design |
| Visual Effects | Chuck Jones | Character Designer |
| Crew | Chris Caswell | Compositor |
| Production | Janice Karman | Producer |
| Production | Ross Bagdasarian Jr. | Producer |
| Crew | Chuck Jones | Creative Consultant |
| Sound | Chris Caswell | Music |
| Visual Effects | Phil Monroe | Animation |
| Visual Effects | Stan Walsh | Animation |
| Visual Effects | Irv Anderson | Animation |
| Visual Effects | Leslie Margolin | Animation |
| Visual Effects | Virgil Ross | Animation |
| Visual Effects | Alan Zaslove | Animation |
| Visual Effects | Terry Lennon | Animation |
| Visual Effects | John McGuire | Animation |
| Visual Effects | Norm McCabe | Animation |
| Visual Effects | Ken O'Brien | Animation |
| Visual Effects | Sam Nicholson | Animation |
| Visual Effects | George Scribner | Animation |
| Visual Effects | Tom Ray | Animation |
| Visual Effects | Dave Brain | Animation |
| Crew | Hal Mason | Additional Writing |
| Editing | Rich Harrison | Editor |
| Production | Mary Roscoe | Associate Producer |
| Production | Mary Roscoe | Production Manager |
