Mary-Kate and Ashley Olsen party in style in NYC

Mary-Kate and Ashley Olsen

Superstar design sisters Mary-Kate and Ashley Olsen have been hitting the party circuit in New York...

Mary-Kate and Ashley Olsen – formerly child stars, now mega-successful award-winning fashion designers for The Row and Elizabeth and James – have been spotted at New York's hottest parties!The twins dressed down in fashionable black for the opening of the Superga store on Wednesday night, with Ashley in a floaty dress, oversize cardigan and white trainers, and MK in skinny jeans.