Mary-Kate and Ashley Olsen are ''thrilled'' their range of Superga sneakers sold out.

The design duo - who have ranges including Elizabeth and James and The Row - were delighted when they were asked by Steve Madden to be involved with the collection and are pleased with how they have been received.

Ashley said: ''When we first met with Steve Madden, who we've collaborated with for a long time, I was wearing my old, beat-up Supergas and he said, 'Oh I've been wanting to buy that company,' and I said, 'Well, you know if you do, please think of us.'

''Now our styles for The Row have sold out in a matter of hours when they first came online, and were thrilled, we really are.''

However Mary-Kate's favourite pair in the collection are not even ones she can wear.

She told WWD.com: ''You just want to grab all the little baby ones, the little cashmere baby ones. They're amazing.''

Mary-Kate has previously revealed she would never leave the house if she wasn't happy with her outfit.

She said: ''I think as soon as you start dressing for someone else, it goes wrong. I can't leave the house if I don't like what I'm wearing. I mean, I literally can't.''