"We don't dive into that world [of social media]; we don't have Instagram or Facebook," explains Ashley Olsen. "So we've never been connected to our customers or our fans in that way. We've stayed quite sheltered."

For young women who have spent almost the entirety of their lives in the public eye, (the twins were cast in the 80s sitcom Full House at the age of six months) Mary Kate and Ashley Olsen have navigated their way into a relatively private existence, putting the focus front and centre on their fashion brands The Row and Elizabeth & James.

Olsen with husband Sarkozy and his daughter (right)

In one of two-three interviews they may give in a year, the Olsen twins were surprisingly candid, opening up on their professional lives - "I've always been a worker," says Ashley. "It has taken me a lot to figure out how to take a vacation," - and, most interestingly, their personal.

Famously private about her relationship with husband of two years French banker, (and brother to the former French Prime Minister) Olivier Sarkozy, 17 years her senior, Mary Kate offers insight into the daily goings-on at their $8 million New York town house. "I think we're lucky [working hard] comes quite naturally for us. We don't need so much time to sit and think and ponder. But then I have a husband, two step-kids and a life; I have to go home and cook dinner. I ride horses on the weekends. You find the thing that helps you relax and if you don't have it, you have to look for it. Or you get burned out and then you're not productive."

Though the oddly-paired couple might confuse some, their married lives seem like domestic bliss.

Mary Kate Olsen opens up about her relationship in rare candid interview