SPOTTED: Mary Kate Olsen and Fiance Olivier Sarkozy In Paris

We're assuming that the vintage 4 ct. Cartier ring Mary Kate Olsen has been sporting on her left hand is in fact an engagement ring from her banker boyfriend Olivier Sarkozy. The two were spotted strolling through a Paris airport looking rather uninvolved while most of us seeing this are all involved in their business.

Check out a close up of the ring in question.

I'm going to go out on a limb and  assume that MK is marrying her boyfriend who is 17 years her senior. They've been dating for quite some time now, it's obvious she's over being a young adult and his brother is the former President of France. When looking for a mate I think these celebs cross all their Ts and dot their Is simply based off status moreso than true love...as well as common sense.