Mary-Kate Olsen and Olivier Sarkozy get cozy at Red Rooster

Mary-Kate Olsen and older beau Olivier Sarkozy brought their romance uptown on Monday night.

The pair hit up Marcus Samuelsson's Harlem hot spot Red Rooster for dinner, and were "kissing, drinking red wine and generally this-close" during their hour-and-a-half-long meal, an eyewitness told us.

Between courses, Olsen, 26, and Sarkozy, 44, took smoke breaks outside, dished the spy.

The fashion designer and the French banker, who is the half-brother of former French President Nicolas Sarkozy, have been dating for about a year.