Lacey Chabert

Eliza Thornberry (voice)

Jodi Carlisle

Marianne Thornberry (voice)

Tim Curry

Nigel Thornberry (voice)

Flea

Donald 'Donnie' Michael Thornberry (voice)

Danielle Harris

Debbie Thornberry (voice)

Tom Kane

Darwin (voice)

Betty White

Grandma Sophie (voice)

Alan Henry Brown

Sri Mayasandra (voice)

Arthur Burghardt

Rhino / Monkey (voice)

Cara DeLizia

Baru / Monkey (voice)

Moira Quirk

Rehabilitation Worker / Monkey (voice)

Dwight Schultz

Badouk / Monkey / Poacher (voice)

Alfre Woodard

Medicine Woman (voice)

Dee Bradley Baker

Parrots (voice)

Patti Deutsch

Female Rhinoceros Hornbill (voice)

Clyde Kusatsu

Sun Bear (voice)

David Paymer

Male Rhinoceros Hornbill (voice)

Pamela Adlon

Saiful (voice)

Tania Gunadi

Villager / Forest Animal (voice)

Benny Tjandra

Villager (voice)

Earl Boen

Bearded Pig / Poacher (voice)

Leila Kenzle

Squirrel / Forest Animal (voice)

Candi Milo

Civat Cat / Mousedeer / Forest Animal (voice)

Pat Musick

Ona / Owl / Forest Animal (voice)

Julia Nickson

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

Amy Hill

Ibu (voice)

Michael Moertl

Villager / Donnie's Father (voice)