"Robert and Françoise Monier make a hot air balloon to fly to the stratosphere. After a visit to Venus, they return home, but have only aged 15 days whereas 25 years have passed on Earth."
Madeleine Sologne
as Françoise Monier, aeronaut
Jean Marchat
as Robert Monier, Françoise's husband
Julien Carette
as Lucien Marchand, laboratory boy
Paul Frankeur
as First smooth-talker
Robert Arnoux
as Banker Antoine
Simone Allain
as Béatrice
Auguste Bovério
as Director
Violette Briet
as Marie
Jean Dasté
as Pépin
Luce Ferrald
as Gaby
Richard Francœur
as Charles
Tony Jacquot
as Young bridegroom
Georges Jamin
as Gustave
Guita Karen
as Venusian
Serge Laroche
as Philippe
Hubert de Malet
Marcel Maupi
as Policeman
Jean Morel
as Commander
Philippe Olive
as Second smooth-talker
Paul Ollivier
as Uncle
Suzanne Dantès
as Camille
Suzanne Dehelly
as Georgette Marchand
Bourvil
as Scientist
Alfred Adam
as Decorator (uncredited)
Erno Crisa
as Man on the Merry-Go-Round (uncredited)
Joé Davray
as (uncredited)
Lucien Desagneaux
as Man at the sidereal station (uncredited)
Jacques Dufilho
as Lumberjack (uncredited)
Pierre Ferval
as Doorman of the scientific institute (uncredited)
Géo Forster
Solange Guibert
as Waitress (uncredited)
François Joux
as Journalist (uncredited)
René Lacourt
Maurice Marceau
as Technician of the scientific institute (uncredited)
Albert Michel
as Police station employee (uncredited)
Maurice Pierrat
as Announcer (uncredited)
Émile Riandreys
as Consumer at the café (uncredited)
Maurice Salabert
as Chief mechanic (uncredited)
André Zwobada
Director