The girls, with their boho-chic style, have become modern-day fashion icons for their fans and they've also designed clothes and have now launched their own clothing line.
They've definitely come a long way in a very short amount of time, but as it turns out, the twins have actually been into fashion for longer than we ever realized.
In a new interview with The Edit, the stylish sisters revealed that they've been sporting designer duds since their days on Full House.
So...Michelle Tanner wore Chanel and Marc Jacobs?! You got it, dude!
Ashley revealed that the majority of their wardrobe was actually made up of adult pieces that were cut down to size, which they reveal is when they became obsessed with getting the perfect fit.
"We were designing clothes for ourselves as we were so petite," Mary-Kate elaborated. "So I think that is when we became obsessed with fit, and now the obsession has become a profession."
Suffice it to say, they were definitely able to capitalize on their experience.
According to one The Richest, Mary Kate and Ashley have a collective net worth of about $300 million.