Image Source: Getty / James Devaney Mary-Kate Olsen is a notoriously private person, especially when it comes to her relationship with Olivier Sarkozy. Since marrying the 47-year-old half-brother of former French President Nicolas Sarkozy, the 30-year-old fashion designer has been pretty tight-lipped about her romance, only briefly mentioning him once during an interview with The Edit. While the two certainly shy away from talking about each other to the press, they have been known to show Pda from time to time when they attend sporting events. If you're curious to know more about them, we've gathered a few interesting details about their relationship below. 1. They Dated For 3 Years Before Tying the Knot Despite their 17-year age gap, the two began dating in 2012 after meeting at a party. Mary-Kate - who was 25 at the time - had reportedly been complaining about "boys not being mature enough for her," and after just one month together,...