The Willards from Terre Haute, Indiana travels abroad for the once-in-a-lifetime vacation in Paris, France. Harry Willard believes that the greatest problem will be avoiding tap water, but bringing his three children will prove to be more troublesome
Fred MacMurray
as Harry Willard
Jane Wyman
as Katherine "Katie" Willard
Michael Callan
as Nick O'Mara
Deborah Walley
as Amy Willard
Jessie Royce Landis
as Countessa 'La Comtesse' DuFresne
Tommy Kirk
as Elliott Willard
Georgette Anys
as Madame Clebert
Kevin Corcoran
as Skipper Willard
Ivan Desny
as Rudolph Hunschak
Françoise Prévost
as The Girl
Alex Gerry
as Horace Bidwell
Howard Smith
as Judge Henderson
