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

Max Showalter as The Tight Suit

Doris Packer as Mrs. Henderson

James Millhollin as Ship's Librarian

Richard Wattis as Party Guest

George Boyce as Ship Passenger