Elenco de A Família Thornberry
| Ator/Atriz | Personagem |
|---|---|
| Carl Lumbly | Tumbulu |
| Michael Horse | Wildlife Ranger Sam Rainwater |
| Bronson Pinchot | Franz Fensterkopf |
| Ed Asner | Frank Hunter |
| Debi Mazar | Mongoose |
| Conchata Ferrell | Grizzly Bear |
| Frank Welker | Mox / Macqaque Wallah |
| Scott Menville | Castorsky |
| Phil LaMarr | Tuku |
| Grey DeLisle | Gazelle #2 |
| Gil Birmingham | Jim's Dad |
| George Cheung | Grandfather / Mitchell Chun |
| Courtney B. Vance | Makai |
| Hector Elizondo | Bald Eagle |
| Nancy Travis | Cat (voice) |
| Alfre Woodard | Medicine Woman (voice) |
| Peter Franzén | Guard (voice) |
| William H. Macy | Skoot (voice) |
| Kathy Najimy | Ostrich / Sand Grouse (voice) |
| Gary Anthony Williams | Forest Hog / Bushbuck (voice) |
| Bill Fagerbakke | Dank (voice) |
| Mindy Sterling | Lemur #2 / Newscaster (voice) |
| Pam Grier | Mother Springbok (voice) |
| Maulik Pancholy | Tenzin / Construction Wallah (voice) |
| April Winchell | Gemsbok #2 (voice) |
| Tara Charendoff-Strong | Little Boy (voice) |
| Jess Harnell | Tortoise / Marsh Deer (voice) |
| Jeff Bennett | Officer (voice) |
Estreias em Destaque
