Bob Newhart

Bernard (voice)

John Fiedler

Owl (voice)

Dub Taylor

Digger (voice)

George Lindsey

Rabbit (voice)

James MacDonald

Evinrude (voice)

Bernard Fox

The Chairman (voice)

Michelle Stacy

Penny (voice)

John McIntire

Rufus (voice)

Jim Jordan

Orville (voice)

Pat Buttram

Luke (voice)

Jeanette Nolan

Ellie Mae (voice)

Joe Flynn

Mr. Snoops (voice)

Geraldine Page

Madame Medusa (voice)

Eva Gabor

Miss Bianca (voice)

Robie Lester

Miss Bianca (singing voice, uncredited)