Few child actors could transition well into an adult career that is quite as successful as their TV or movie ones. We've all heard of the horror stories of young child actors spinning out of control, unable to make that leap from their kiddie stardom into anything resembling a stable adult career. These makes these wonder twins quite an exception. Mary Kate and Ashley Olsen's fashion empire is as big as ever, and the two are well respected in their new, chosen industry, after their turn as cute Michelle Tanner on Full House.

The billionaire twins recently sat down with Elle magazine to discuss all things related to the Mary Kate and Ashley Olsen fashion empire. The two have been working since they were literally a toddler, so it's no surprise that they have lasted so long and have had the determination to work very hard at building their fashion house, The Row. The twins share that all they have really done is take things one day at a time. "Every move that we've made through the past 10 years has been step-by-step. One item at a time. We sit and look at everything in every possible version of how you might wear it. We are all about making our clothes work with reality."

Another things that has allowed the Mary Kate and Ashley Olsen fashion brand to flourish is to know what kind of people they are catering to. For the twins, their buyers come a diverse background, from all over the world! This knowledge comes into play when they are coming up with their designs. "What's been the most telling about the business is our store in L.A." Ashley shares. "Many of the women are inter- national clients who come to L.A. only to shop, so we like to play with different materials. Our client is very understated, but she's happy to spend the money."