If you've spotted a quartet of long-legged beauties in the room at most of this season's fashion week festivities, and wondered who the elegant ladies are, you are not alone. The Courtin-Clarins girls are the Parisian heiresses to the Clarins empire, founded by their grandfather 60 years ago, but today they are making their own mark on the fashion world. This fashion week, we have seen them everywhere, from the pages of Vogue to the front row of shows. With four unique, but equally stunning looks and personalities, the girls have begun several ventures together (and apart) that are sure to make them household names. Take a look at our slideshow to get to know each one of the power foursome.