Mary-Kate Olsen is engaged to Olivier Sarkozy, the half-brother of former French president Nicolas Sarkozy.

Olsen, 27, and Sarkozy, 44, have been dating since 2012. The couple’s 17-year age difference (and height difference) have made them a hot topic for celebrity gossip.

This will be the French banker’s second marriage. He has two children – Julien, 12 and Margo, 10 – with former wife Charlotte Bernard. They divorced in 2011.


Olivier with Mary-Kate and his daughter Margo

Mary-Kate and twin sister Ashley are reportedly worth $US100 million ($111 million).

The twins must have a thing for older men: Ashley is dating Moneyball director Bennett Miller, 47.

What do you think of Mary-Kate and Olivier’s 17-year age difference?