One Night Only is a 2026 American science fiction romantic comedy film directed and produced by Will Gluck from a screenplay by Travis Braun. Monica Barbaro and Callum Turner are the leads, with Maya Hawke in a supporting role. It follows the premise of an alternate future where love-starved Allie and Owen keep crossing paths on the one night a year where single people are legally allowed to have sex due to a year long federal mandate banning premarital relations.

Summary from Wikipedia (CC BY-SA).