Barbara Frawley as Dot (voice)

Joan Bruce as The Kangaroo / Mother (voice)

Spike Milligan as Mr. Platypus (voice)

June Salter as Mrs. Platypus (voice)

Ross Higgins as Willie Wagtail (voice)

Ron Haddrick as Father (voice)

Richard Meikle as Jack, the Farmhand (voice)

Lola Brooks as (voice)

Peter Gwynne as (voice)

George Assang as (voice)

Kerrie Biddell as (voice)

John Derum as (voice)

Kevin Golsby as (voice)

Nola Lester as (voice)

Sue Walker as (voice)

Noel Brophy as (voice)

Anne Haddy as (voice)

Robina Beard as (voice)