Two identical twin sisters, separated at birth by their parents' divorce, are reunited years later at a summer camp, where they scheme to bring their parents back together. The girls, one of whom has been living with their mother and the other with their father, switch places after camp and go to work on their plan, the first objective being to scare off a gold-digger pursuing their father.
Hayley Mills
as Susan Evers / Sharon McKendrick
Maureen O'Hara
as Margaret 'Maggie' McKendrick
Brian Keith
as Mitch Evers
Charles Ruggles
as Charles McKendrick
Cathleen Nesbitt
as Louise McKendrick
Una Merkel
as Verbena
Joanna Barnes
as Vicky Robinson
Linda Watkins
as Edna Robinson
Crahan Denton
as Hecky
Leo G. Carroll
as Rev. Dr. Mosby
Ruth McDevitt
as Miss Inch
Nancy Kulp
as Miss Grunecker
