"In Serieux comme le plaisir, two men and a woman live quite happily together in a romantic liaison. The woman is probably wealthy anyway, so the trio doesn't worry much about money. One day they decide to take a trip in their beat-up car, managing the whole affair in their own special, insouciant manner. They are followed by a suspicious policeman who thinks there's something fishy about this group..."
Jane Birkin
as Ariane Berg
Richard Leduc
as Bruno
Raymond Bussières
as Le pêcheur (Buster Keaton)
Georges Mansart
as Patrice
Paul Demange
as Le "spécialiste" des jeux de cartes
Hubert Deschamps
as L'homme au restaurant
Marc Dudicourt
as Le mercier
Martine Kelly
as
Isabelle Huppert
as Une fille ramenée à la maison
Serge Gainsbourg
as L'inconnu du lac
Michael Lonsdale
as Inspecteur Fournier
Jean-Luc Bideau
as Un homme sur la route
