Mary-Kate and Ashley Olsen through the years

Twins Ashley Olsen, left, and Mary-Kate Olsen attend the "China: Through The Looking Glass" Costume Institute Benefit Gala at the Metropolitan Museum of Art in Manhattan on May 4, 2015.

Mary-Kate Olsen, left, and Ashley Olsen attend the 2014 World of Children Awards at 583 Park Avenue in Manhattan on Nov. 6, 2014. Shahista Lalani, a former intern, has sued the Olsen twins' licensing and manufacturing company, saying she worked 50 hours a week but wasn't paid.

Christian Louboutin and Ashley Olsen at 'Louis Vuitton celebrates the iconic Monogram' at MoMA in Manhattan, New York on Nov. 7, 2014.

Accessories designer of the year award recipients Mary-Kate Olsen and Ashley Olsen pose backstage at the 2014 CFDA Fashion Awards at Alice Tully Hall in Manhattan, New York on June 2, 2014.

Ashley Olsen (left) and Mary-Kate Olsen attend the "Charles James: Beyond Fashion" Costume Institute Gala at The Metropolitan Museum of Art in Manhattan, New York on May 5, 2014.

Bob Saget and Ashley Olsen pose together at the Cool Comedy Hot Cuisine Event to benefit the Scleroderma Research Foundation.

Ashley Olsen (left) and Mary-Kate Olsen attend the launch of the Elizabeth and James Fall 2013 Handbag Collection at a cocktail party held at Chateau Marmont in West Hollywood, California, on June 19, 2013.

Mary-Kate Olsen and Ashley Olsen attend the CFDA Awards Nomination event on March 13, 2013, in Manhattan.

Mary-Kate Olsen and Ashley Olsen pose at FIJI Water at the J. Mendel Spring 2012 show during Mercedes-Benz Fashion Week in Manhattan, New York on Sept. 14, 2011.

The "Full House" cast, from left: Jodie Sweetin, Bob Saget, Candace Cameron, John Stamos, Mary Kate (or Ashley) Olsen and David Coulier.