Tacey and Harry King are a suburban couple with three sons and a serious need of a babysitter. Tacey puts an ad in the paper for a live-in babysitter, and the ad is answered by Lynn Belvedere. But when she arrives, she turns out to be a man. And not just any man, but a most eccentric, outrageously forthright genius with seemingly a million careers and experiences behind him.
Robert Young
as Harry King
Maureen O'Hara
as Tacey King
Clifton Webb
as Lynn Belvedere
Richard Haydn
as Mr. Clarence Appleton
Louise Allbritton
as Edna Philby
Randy Stuart
as Peggy
Ed Begley
as Horatio J. Hammond
Larry Olsen
as Larry King
John Russell
as Bill Philby
Betty Lynn
as Ginger
Willard Robertson
as Mr. Ashcroft
Charles Arnt
as Mr. Taylor (uncredited)
