Between their luxury line The Row and their contemporary brand, Elizabeth & James, Mary-Kate and Ashley Olsen -- who turn 25 on Monday -- are a major force in the fashion industry (First Lady Michelle Obama and Carey Mulligan wear the duo's designs).
But even before becoming respected designers, the mini-moguls were making news with their individual sartorial choices both on and off the red carpet.
Mary-Kate's style, which was once described as "dumpster chic" thanks to her preference for oversized layers and loose-fitting designs, has evolved into an edgy, boho-chic look.
Ashley, on the other hand, tends to look more sophisticated and polished than her sister, opting for glamorous designer duds and luxe accessories like the pale blue strapless dress by The Row and gold Manolo Blahnik heels she wore to the 2011 CFDA Fashion Awards.
Tell Us: Whose style would you steal -- Mary Kate's or Ashley's?