Son of Flubber

Fred MacMurray

Ned Brainard

Nancy Olson

Betsy Brainard

Keenan Wynn

Alonzo P. Hawk

Tommy Kirk

Biff Hawk

Ed Wynn

A.J. Allen

Charles Ruggles

Judge Murdock

Leon Ames

Rufus Daggett

Ken Murray

Mr. Hurley

William Demarest

Mr. Hummel

Paul Lynde

Sportscaster

Elliott Reid

Shelby Ashton

Bob Sweeney

Mr. Harker

Joanna Moore

Desiree de la Roche

Edward Andrews

Defense Secretary

James Westerfield

Officer Hanson

Alan Carney

Referee