The French banker, who is a half-brother of former French President Nicolas Sarkozy, has been dating the Mary-Kate for two years.
Insiders say Mary-Kate has made Olivier a better father to his two kids from a previous marriage; Julien, 12, and Margo, 10. "She remembers all the kids' special events. She thinks he's a great dad."
Apparently, her family loves him too. Another source told the mag, "Mary-Kate's family thinks Olivier is the best thing to happen to her. They love him.”
This will be Mary-Kate’s first marriage, and Olivier’s second.
Ashley is reportedly dating an older man too… “Moneyball” director Bennett Miller, 20 years her senior.