Starred in the ABC sitcom Full House, sharing the role of Michelle Tanner with her fraternal twin sister Ashley Olsen. She and Ashley then went on to star in a number of movies and launch their own clothing lines.
The twins were cast onto Full House when they were just nine months old.
She and Ashley starred in a musical mystery video series entitled The Adventures of Mary-Kate & Ashley from 1994 to 1997.
In 2015, she married French banker Olivier Sarkozy. Her younger sister Elizabeth Olsen went on to star in such films as Mary Martha May Marlene and Silent House. The sisters also have an older brother named Trent and two half siblings. Her parents Jarnette and David Olsen divorced in 1996.
The twins starred alongside Bob Saget in the long-running series Full House.