Mary-Kate Olsen (born June 13, 1986), along with her twin sister Ashley Olsen, portrayed Michelle Tanner on Full House. They have their own clothing line and are in many movies. In 1987, at the age of six months, the twins were cast in the role of Michelle. They began filming at nine months of age. In order to comply with child labor laws that set strict limits on how long a child actor may work, the sisters took turns playing the role. The Olsens continued to portray Michelle throughout the show's run. There were a few episodes where the twins appeared together: "The Seven-Month Itch", "Greek Week", "The Devil Made Me Do It", and "Michelle Rides Again".