Running three fashion lines may seem like a daunting task, but Mary-Kate and Ashley Olsen have managed to create a sought-after fashion empire at just 24 years old. The twins give a glimpse into their busy lives in the April issue of Vogue.

"We hired a showroom and talked buyers through," Ashley says, recounting when their fashion endeavor was just starting out and they had to convince buyers that their designs were legit.

"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."

Mary-Kate and Ashley's lines, The Row, Elizabeth & James and Olsenboye, have quietly garnered acclaim from some of the top buyers in the industry. Now the designers are up for their first CDFA Award (one of the fashion industry's top honors), which pretty much solidifies them in the fashion realm.