 | Jodi Benson als Thumbelina (voice) |
 | Gino Conforti als Jacquimo (voice) |
 | Barbara Cook als Mother (voice) |
 | Will Ryan als Hero / Reverend Rat (voice) |
 | June Foray als Queen Tabitha (voice) |
 | Kenneth Mars als King Colbert (voice) |
 | Gary Imhoff als Prince Cornelius (voice) |
 | Joe Lynch als Grundel (voice) |
 | Charo als Mrs. Toad (voice) |
 | Danny Mann als Mozo (voice) |
 | Loren Lester als Gringo (voice) |
 | Kendall Cunningham als Baby Bug (voice) |
| Tawny Sunshine Glover als Gnatty (voice) |
| Michael Nunes als Li'l Bee (voice) |
 | Gilbert Gottfried als Berkeley Beetle (voice) |
 | Pat Musick als Mrs Rabbit (voice) |
 | Neil Ross als Mr. Fox / Mr. Bear (voice) |
 | Carol Channing als Ms. Fieldmouse (voice) |
 | John Hurt als Mr. Mole (voice) |
 | Tony Jay als Cow (voice) |
 | Randy Crenshaw als Berkeley Beetle (singing voice) |
 | Stevie Vallance als (voice) |
| Don Bluth | Director |
| Don Bluth | Screenplay |
| Gary Goldman | Director |
| Martin Maryska | Sound Designer |
| Robert Sprathoff | Animation |
| Jeannette Maher-Manifold | Camera Operator |
| Fred A. Reilly | Layout |
| Kevin M. O'Neil | Animation |
| Dave Kupczyk | Animation Director |
| Gregg Landaker | Sound Re-Recording Mixer |
| Steve Maslow | Sound Re-Recording Mixer |
| Nikki Moss | Supervising Film Editor |
| Fiona Trayler | Editor |
| Jim Harrison | Music Editor |
| Helene Blitz | Associate Producer |
| Don Bluth | Producer |
| Russell Boland | Associate Producer |
| Gary Goldman | Producer |
| John Pomeroy | Producer |
| Rowland B. Wilson | Production Design |
| David Goetz | Production Design |
| Cathy Goldman | Production Manager |
| Gerry Shirren | Production Supervisor |
| Olga Tarin-Craig | Production Manager |
| Susan Vanderhorst | Assistant Production Manager |
| Peter Denomme | Production Manager |
| Moya Mackle | Assistant Director |
| Nuala O'Toole | Assistant Director |
| Barry Manilow | Songs |
| Barry Manilow | Music |
| Jack Feldman | Songs |
| Bruce Sussman | Songs |
| Hans Christian Andersen | Author |
| Mark Swan | Storyboard Artist |
| Sandro Cleuzo | Animation |
