- Faith: Christian
- Career: Actress
- Birthday: June 13, 1986
- Accomplishments: Kids Choice Awards, Teen Choice Awards
- Fun Faith Fact!: Mary-Kate is the twin sister of actress Ashley Olsen.
Mary-Kate Olsen is a fashion designer, producer, author, businesswomen and former actress. She has co-founded several luxury and affordable fashion brands with her sister, Ashley. She began her acting career at the age of nine months as Michelle Tanner on the popular TV series Full House in 1987. Following the show, Mary-Kate and her sister created a string of successful straight-to-video movies and became a popular figure in the preteen market of the time. In 2012, Mary-Kate decided to quit acting to focus on fashion. She has received many awards for her innovative and creative designs.