Millionaires for One Day (French: Millionnaires d'un jour) is a 1949 French comedy film directed by André Hunebelle and starring Gaby Morlay, Jean Brochard and Ginette Leclerc. It was shot at the Francoeur Studios in Paris. The film's sets were designed by the art director Lucien Carré. It was produced and distributed by Pathé.
Due to an error printed in a newspaper, a number of people wrongly believe they have won the lottery. When the mistake is revealed, it transpires that they are all better off anyway.