Who is Mary-Kate Olsen?
Mary-Kate Olsen is an American fashion designer, businesswoman, author, and producer. Mary-Kate Olsen was born on June 13, 1986 in Sherman Oaks, Los Angeles, California, United States. As of 2026, Mary-Kate Olsen is 40 years old. Published estimates place the net worth of Mary-Kate Olsen at $150 million.
