Mary-Kate Olsen (born June 13, 1986) is an American actress, fashion designer, producer, author, and businesswoman. She co-founded luxury fashion brands The Row, Elizabeth and James, and the more affordable lines Olsenboye and StyleMint alongside her fraternal twin sister Ashley Olsen. Olsen pursued acting independently as an adult until 2012. She is the older sister of actress Elizabeth Olsen.
Mary-Kate was born in Sherman Oaks, Los Angeles, California, the daughter of Jarnette “Jarnie”, a personal manager, and David “Dave” Olsen, a real estate developer and mortgage banker. Along with her twin, Ashley, she has an older brother, Trent, a younger sister, Elizabeth Olsen, and two half siblings from her father’s second marriage. Olsen’s parents divorced in 1996.
Along with Ashley, Olsen was cast at the age of nine months to share the role of Michelle Tanner on the ABC sitcom Full House. The Olsen twins portrayed Michelle throughout the series’ 1987-95 run. In the early 1990s, she and Ashley established a company, Dualstar, which produced a long string of TV movies and direct-to-video releases featuring the girls. The Olsens continued to release direct-to-video films up to the early 2000s, along with starring in the 1995 feature film It Takes Two. In 1997, the Olsen twins guest starred in an episode of Sister, Sister, alongside rival twin actresses Tia Mowry and Tamera Mowry. After Full House, the sisters starred in two other sitcoms (Two of a Kind and So Little Time) and an animated series (Mary-Kate and Ashley in Action!). The former lasted one season while the latter ran for two seasons. These ventures, combined with an array of licensing deals for their names and likenesses, made Olsen wealthy at a young age. In 2004, Olsen’s wealth was estimated at $137 million.