Little had been known about Allen's next film before Thursday when Sony Pictures Classics announced it will distribute "Magic in the Moonlight." It stars Colin Firth, Emma Stone and Marcia Gay Harden.
Sony Pictures Classics said it's about "an Englishman brought in to help unmask a possible swindle." The film is set "against the backdrop of the Cote d'Azur, jazz joints and fashionable spots for the wealthy of the Jazz Age."
Allen shot the film last year in southern France. His 2011 hit "Midnight in Paris" also drew on the romance of '20s France.
No release date was announced. It's Allen's seventh film for Sony Pictures Classics.