Mary-Kate Olsen Mary-Kate Olsen is defo her own person.

However, you can't ignore the fact that there's another wondering around who looks just like her - her twin Ashley.

But don't thinking that that means all is rosy in the Olsen garden.

Because MK will tell you otherwise.

In fact, it seems that these two feisty fillies are not all that similiar when you get past their looks.

And their differing personalities can often lead to barneys.Mary-Kate and Ashley Olsen

MK told Elle mag: "We don't agree all the time. The way we go about business or designing or making a decision is that we come at it from two completely different angles that, at the end of the day - even when we don't think we're agreeing with each other - we are agreeing.

"We're just getting there in different ways. Unless you're a twin, you honestly can't know how close twins can be.

"When there's that much love there's... well, there's the opposite of everything, but it stems from love, and it stems from passion.

"We're driven people. I do know I can't work in an office. Ashley, on the other hand, loves going to an office."

One thing's for sure - together they're a force to be reckoned with.

Want more Mary-Kate action? Check out Mary-Kate's Greatest Hits on Sky Style.