Mary-Kate Olsen is an American actress, fashion designer, and businesswoman, born on June 13, 1986. She gained fame as a child star, sharing the role of Michelle Tanner on the popular television show Full House alongside her twin sister, Ashley Olsen. The twins became household names and later starred in various films and television series. In addition to acting, Mary-Kate co-founded the fashion brands The Row and Elizabeth and James, which have received critical acclaim. She is known for her unique style and has made a significant impact on the fashion industry, establishing herself as a successful entrepreneur.