 | Janice Karman als Theodore Seville / Brittany / Jeanette / Eleanor (voice) |
 | Ross Bagdasarian, Jr. als David 'Dave' Seville / Alvin Seville / Simon Seville (voice) |
 | June Foray als Vinny (voice) |
| Elana Lesser | Co-Writer |
| Janice Karman | Producer |
| Ken Spears | Executive Producer |
| Joe Ruby | Executive Producer |
| Ross Bagdasarian, Jr. | Writer |
| Larry Huber | Associate Producer |
| Cliff Ruby | Co-Writer |
| Charles A. Nichols | Director |
| Ross Bagdasarian, Jr. | Producer |
| Janice Karman | Writer |
