The adorable, youngest member of the Tanner clan was played by the brilliant Olsen Twins. Out of all the other Full House cast members, Mary-Kate and Ashley are now indisputably the most recognizable celebrities of the series. You know the story — they've taken over the world with their own product empire. Their line, The Row, is a very high-fashion, very well respected endeavor. And they're gazillionaires. Let's be friends.