Age Aint Nothing But A Number! Mary Kate Olsen Is Engaged To Oliver Sarkozy.

Mary-Kate, 27, is reportedly engaged to her boyfriend of two years, Olivier Sarkozy, 44! The couple first were spotted together in 2012 in New York and have since been spotted various times over the past two years, and have a home in the city. Olivier was previously married to Charlotte Bernard, and has two children with her, Julien, 12, and Margo, 10. He is also the brother of 44-year-old Nicolas Sarkozy, the former French president. THR.