Eliza Thornberry (voice)

Lacey Chabert

Marianne Thornberry (voice)

Jodi Carlisle

Nigel Thornberry (voice)

Tim Curry

Donald 'Donnie' Michael Thornberry (voice)

Flea

Debbie Thornberry (voice)

Danielle Harris

Darwin (voice)

Tom Kane

Grandma Sophie (voice)

Betty White

Rhino / Monkey (voice)

Arthur Burghardt

Baru / Monkey (voice)

Cara DeLizia

Rehabilitation Worker / Monkey (voice)

Moira Quirk

Badouk / Monkey / Poacher (voice)

Dwight Schultz

Kickboxing Instructor (voice)

Tuan Tran

Medicine Woman (voice)

Alfre Woodard

Parrots (voice)

Dee Bradley Baker

Female Rhinoceros Hornbill (voice)

Patti Deutsch

Sun Bear (voice)

Clyde Kusatsu

Male Rhinoceros Hornbill (voice)

David Paymer

Lugan (voice)

Maureen Quinn

Saiful (voice)

Pamela Adlon

Tribal Man / Villager / Poacher (voice)

Jusak Bernhard

Villager / Forest Animal (voice)

Tania Gunadi

Villager (voice)

Benny Tjandra

Bearded Pig / Poacher (voice)

Earl Boen

Squirrel / Forest Animal (voice)

Leila Kenzle

Civat Cat / Mousedeer / Forest Animal (voice)

Candi Milo

Ona / Owl / Forest Animal (voice)

Pat Musick

Villager / Forest Animal / Donnie's Mother (voice)

Julia Nickson

Ibu (voice)

Amy Hill

Villager / Donnie's Father (voice)

Michael Moertl