Monkey Business

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.

• 
  Howard Hawks

• 
  Cary Grant
  Barnaby Fulton
• 
  Ginger Rogers
  Edwina Fulton
• 
  Charles Coburn
  Oliver Oxley
• 
  Marilyn Monroe
  Lois Laurel
• 
  Hugh Marlowe
  Hank Entwhistle
• 
  Henri Letondal
  Jerome Kitzel
• 
  Robert Cornthwaite
  Dr. Zoldeck
• 
  Larry Keating
  GJ Culverly
• 
  Douglas Spencer
  Dr. Brunner
• 
  Esther Dale
  Mrs. Rhinelander
• 
  George Winslow
  Little Indian
• 
  Marjorie Holliday
  Oxley Receptionist (uncredited)
• 
  Harry Carey, Jr.
  Reporter (uncredited)
• 
  Nico Minardos
  Man at Pool (uncredited)
• 
  Charlotte Austin
  Student (uncredited)
• 
  Harry Bartell
  Scientist (uncredited)
• 
  Faire Binney
  Dowager (uncredited)
• 
  Tex Brodus
  Club Patron (uncredited)
• 
  Olive Carey
  Johnny's Mother (uncredited)
• 
  Harry Carter
  Scientist (uncredited)