Kirsten & Mary-Kate's Beauty Brush-Up

Kirsten Dunst and Mary-Kate Olsen indulge in beauty treatments at the Aurelia Adrian Institut de Beaute on Thursday in Los Angeles.

MK’s twin sister, Ashley was recently cast as a “sexually promiscuous girl” in the upcoming drama The Informers, a movie set in 1980s Los Angeles that follows the life of a movie executive, his wife, his mistress, a rock star, a vampire and a kidnapper.

Also joining the movie are Billy Bob Thornton, Kim Basinger and Brandon Routh.

10+ pictures inside of Kirsten & MK‘s beauty brush-ups…