A rich, beautiful couple give birth to deformed alien twins who, when their heads are together, are the smartest kids on the planet.
Jerry Lewis
Wilbur Swain / Caleb Swain
Madeline Kahn
Eliza Swain / Lutetia Swain
Marty Feldman
Sylvester
Jim Backus
President of the U.S.
Merv Griffin
Anchorma
Pat Morita
Ah Fong, the Chinese Ambassador
Orson Welles
Aliens' Father (voice)
John Abbott
Dr. Frankenstein
