Lacey Chabert

Eliza Thornberry (voice)

Tom Kane

Darwin (voice)

Cree Summer

Phaedra (Elephant) (voice)

Tim Curry

Nigel Thornberry / Col. Radcliff Thornberry (voice)

Lynn Redgrave

Cordelia Thornberry (voice)

Jodi Carlisle

Marianne Thornberry (voice)

Danielle Harris

Debbie Thornberry (voice)

Flea

Donnie Thornberry (voice)

Crystal Scales

Cheetah Cubs (voice)

Kimberly Brooks

Tally (Cheetah Cub) (voice)

Alfre Woodard

Akela (Cheetah Mother) (voice)

Brock Peters

Jomo (voice)