Mary-Kate Olsen is an American actress and designer, who is most famous for starring alongside her twin sister Ashley Olsen in the TV series Full House. From there, Mary-Kate and Ashley established a successful career together, scoring several TV and films roles. In 1993, the production company Dualstar was founded to create, produce and market films and TV shows starring Mary-Kate and Ashley. It went on to be hugely profitable, and in 2004, Mary-Kate became the company's joint CEO. The stylish twins also used their status as fashion icons to their advantage, and, after several collaborative projects with retailers, formed their own successful design house, The Row. In 2005, Mary-Kate ended her romance with Greek shipping heir Stavros Niarchos III. Olsen has also dated Maxwell Snow, and artist Nate Lowman in the past. But wedded Olivier Sarkozy in 2015, Olivier is a wealthy banker and half-brother of former French president Olivier Sarkozy.