Research chemist Barnaby Fulton works on a fountain of youth pill for a chemical company. One of the labs chimps gets loose in the laboratory and mixes chemicals, but then pours the mix into the water cooler. When trying one of his own samples, washed down with water from the cooler, Fulton begins to act just like a twenty-year-old and believes his potion is working. Soon his wife and boss are also behaving like children.
Cary Grant
Ginger Rogers
Charles Coburn
Marilyn Monroe
Hugh Marlowe
Henri Letondal
Robert Cornthwaite
Larry Keating
Douglas Spencer
Esther Dale
George Winslow
Marjorie Holliday
Harry Carey, Jr.
Nico Minardos
Charlotte Austin
Harry Bartell
Faire Binney
Tex Brodus
Olive Carey
Harry Carter
Melinda Casey
Ronnie Clark
Russ Clark
Heinie Conklin
George Eldredge
Kathleen Freeman
Terry Goodman
Dabbs Greer
Howard Hawks
George Hoagland
Perk Lazelle
Rudy Lee
Louis Lettieri
Mickey Little
Emmett Lynn
Paul Maxey
John McKee
Bill McLean
Joseph Mell
Christopher Milne
Jonathan Milne
Ray Montgomery
Roger Moore
Brad Morrow
Forbes Murray
Robert Nichols
Jerry Paris
Maudie Prickett
Jimmy Roebuck
Harry Seymour
Jerry Sheldon
Olan Soule
Gil Stratton
Ruth Warren
Mack Williams
Isabel Withers