Mary-Kate Olsen and Ashley Fuller Olsen, also known as the Olsen twins, are American fashion designers and former actresses. Mary-Kate and Ashley made their acting debut as infants playing Michelle Tanner on the television sitcom Full House (1987–1995). As they grew older, they began starring in other television shows, films, and media through their own production company, Dualstar. The twins became preteen icons, and some of the wealthiest women in the entertainment industry at a young age.

Mary-Kate Olsen is an American businesswoman, fashion designer, equestrian, and former actress. Her acting career began at the age of nine months, with her sharing the role of Michelle Tanner with her twin sister Ashley Olsen in the television sitcom Full House (1987–1995). They also starred in numerous films together.