Lacey Chabert

as Eliza Thornberry (voice)

Jodi Carlisle

as Marianne Thornberry (voice)

Tim Curry

as Nigel Thornberry (voice)

Flea

as Donald 'Donnie' Michael Thornberry (voice)

Danielle Harris

as Debbie Thornberry (voice)

Tom Kane

as Darwin (voice)

Betty White

as Grandma Sophie (voice)

Alan Henry Brown

as Sri Mayasandra (voice)

Arthur Burghardt

as Rhino / Monkey (voice)

Cara DeLizia

as Baru / Monkey (voice)

Moira Quirk

as Rehabilitation Worker / Monkey (voice)

Dwight Schultz

as Badouk / Monkey / Poacher (voice)

Tuan Tran

as Kickboxing Instructor (voice)

Alfre Woodard

as Medicine Woman (voice)

Dee Bradley Baker

as Parrots (voice)

Patti Deutsch

as Female Rhinoceros Hornbill (voice)

Clyde Kusatsu

as Sun Bear (voice)

David Paymer

as Male Rhinoceros Hornbill (voice)

Maureen Quinn

as Lugan (voice)

Pamela Adlon

as Saiful (voice)

Jusak Bernhard

as Tribal Man / Villager / Poacher (voice)

Denny Chandra

as Villager (voice)

Tania Gunadi

as Villager / Forest Animal (voice)

Malik Nasution

as Villager (voice)

Benny Tjandra

as Villager (voice)

Earl Boen

as Bearded Pig / Poacher (voice)

Leila Kenzle

as Squirrel / Forest Animal (voice)

Candi Milo

as Civat Cat / Mousedeer / Forest Animal (voice)

Pat Musick

as Ona / Owl / Forest Animal (voice)

Julia Nickson

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

Amy Hill

as Ibu (voice)

Michael Moertl

as Villager / Donnie's Father (voice)