Twelve Hours of Happiness (French: Douze heures de bonheur) is a 1952 French romantic comedy drama film directed by Gilles Grangier and starring Dany Robin, Georges Marchal and Jean Tissier.^{[1] [2]} The film's sets were designed by the art director Robert Clavel. It is also known by the alternative title Jupiter.

The daughter of a provincial pharmacist is due to marry her distant cousin Gilbert in an arranged marriage. However, she meets a stranger in the forest who has escaped from an asylum and who she dubs "Jupiter". He pretends to be her cousin and makes a good impression on the pharmacist. However complications ensue when the real cousin arrives.

• Dany Robin as Yvette Cornet
• Georges Marchal as Jupiter' L'inconnu - l'évadé de lasile psychiatrique
• Jean Tissier as Benjamin Cornet
• Huguette Duflos as Clémence Cornet
• François Guérin as Gilbert Lantois
• Pierre Moncorbier as Le gendarme Mérovée
• Robert Seller
• Micheline Gary
• Floriane Prévot

• Bessy, Maurice & Chirat, Raymond. Histoire du cinéma français: 1951–1955. Pygmalion, 1989.
• Rège, Philippe. Encyclopedia of French Film Directors, Volume 1. Scarecrow Press, 2009.

• Twelve Hours of Happiness at IMDb