Mary-Kate Olsen (born June 13, 1986) is an American actress, producer, author and fashion designer. She made her career debut in 1987 alongside her twin sister Ashley Olsen in the television series Full House. Following the huge success of Full House in America, Mary-Kate and Ashley established a successful career starring in television and film roles that saw her become an international household name. Founded in 1993, the production company Dualstar was created to produce and merchandise films and TV shows starring Mary-Kate and Ashley, becoming an extremely profitable enterprise. Mary-Kate became joint CEO of Dualstar in 2004, securing her position in the Forbes celebrity rich list. Mary-Kate is the older sister of Elizabeth Olsen.
