Digby, the Biggest Dog in the World

Jim Dale

Jeff Eldon

Spike Milligan

Dr. Harz

Angela Douglas

Janine

John Bluthal

Jerry

Norman Rossington

Tom

Milo O'Shea

Dr. Jameson

Richard Beaumont

Billy White

Dinsdale Landen

Col. Masters

Garfield Morgan

Rogerson

Victor Spinetti

Prof. Ribart

Harry Towb

Ringmaster

Kenneth J. Warren

Gen. Frank

Bob Todd

The Great Manzini

Frank Thornton

Estate Agent

Sheila Steafel

Control Operator

Henry McGee

TV Announcer

Richard Calder

Soldier

Fernville Lord Digby

Digby

Maurice Dunster

Road Cafe Cook (uncredited)