Scott Bakula as Danny (voice)

Jasmine Guy as Sawyer (voice)

Natalie Cole as Sawyer (singing voice)

Ashley Peldon as Darla Dimple (voice)

Lindsay Ridgeway as Darla Dimple (singing voice)

Frank Welker as Farley Wink (voice)

Don Knotts as T.W. Turtle (voice)

George Kennedy as L.B. Mammoth (voice)

John Rhys-Davies as Woolie Mammoth (voice)

Kathy Najimy as Tillie Hippo (voice)

René Auberjonois as Flanigan (voice)

Hal Holbrook as Cranston (voice)

Betty Lou Gerson as Frances (voice)

Dee Bradley Baker as Kong / Additional Voices (voice)

David Johansen as Bus Driver (voice)

Mark Dindal as Max (voice)

Bob Bergen as Additional Voices (voice)

Debi Derryberry as Additional Voices (voice)

Bill Farmer as Additional Voices (voice)

Barbara Goodson as Additional Voices (voice)

Catherine Battistone as Additional Voices (voice)

Vanessa Theme Ament as Additional Voices (voice)

Rick Logan as T.W. Turtle (singing voice)

Matthew Herried as Peabo 'Pudge' Pudgemyer (voice)