The pair, who are known for their kooky style, pose in polka-dot Tom Ford pyjamas in the accompanying photo shoot.
In the kooky shot, they are pictured balancing on stilts on the beach while clutching empty wine glasses.
The blonde-haired sisters also posed for famed photographer Bruce Weber in dusty pink dresses from from their own range while they peeped over an antique Brigitte Bardot book.
The sisters insist that unlike some celebrity brands, they are heavily involved in every aspect of the design process.
The pair were were initially met with cynicism when the started out in the fashion world.
'We hired a showroom and talked buyers through,' Ashley says.
'People would drill us about fabric, where we'd make it,' Mary-Kate adds. 'The first season, customers bought it, so the stores came back. And drilled us again.'