Businessman Paul Bultitude is sending his son Dick to a boarding school. While holding a magic stone from India, he wishes that he could be young again. His wish is immediately fulfilled and the two change bodies with each other. Mr Bultitude becomes a school boy who smokes cigars and has a very conservative view on child upbringing, while his son Dick becomes a gentleman who spends his time drinking lemonade and arranging children's parties.
Roger Livesey
as Paul Bultitude
Anthony Newley
as Dick Bultitude
Kay Walsh
as Florence 'Fanny' Verlane
Petula Clark
as Dulcie Grimstone
James Robertson Justice
as Dr. Grimstone
David Hutcheson
as Marmaduke Paradine
Harcourt Williams
as Judge
Bill Shine
as Lord Gosport
Kynaston Reeves
as Dr. Chawner
Ernest Jay
as Bowler
Joan Young
as Mrs. Grimstone
Patricia Raine
as Alice
