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