Mary-Kate Olsen and Ashley Fuller Olsen (both born June 13, 1986) are American actresses, best known for playing the role of Michelle Tanner on the sitcom Full House. Though some people at first glance suppose they are identical twins, it is widely reported that they are fraternal. Both Olsen twins have appeared in television and films since infancy. Since then, they have continued their celebrity through numerous television programs, films, interviews, as well as commercial endorsements. As a rule, they appear together, and have filmed movies worldwide.