While both Mary-Kate and Ashley Olsen alternated in portraying Michelle Tanner throughout Full House, the twins appeared together on-screen in several episodes. Like many TV shows featuring young children, Michelle Tanner was played by a pair of twins, which is commonplace for infant and toddler characters due to child labor laws and the ability to switch the kids if one prevents a scene from progressing. As the Olsen twins and Michelle Tanner grew older, both girls continued to play the Full House character, even though it became easier to tell Mary-Kate and Ashley apart as Michelle.