By Marianne Mychaskiw
Updated Feb 22, 2016 @ 2:00 pm
Credit: Bruce Glikas/FilmMagic, Neil Rasmus/BFA/REX/Shutterstock

If you've ever had problems telling the Olsen twins apart, let Ashley Olsen's new brunette hair be your guide. In the midst of the whirlwind that was NYFW last week, the star took her blonde strands to a rich brown tone.

At a party fêting The Row’s collaboration with Oliver Peoples, the actress and designer's 'do (above, right and below, left) looked markedly darker than twin sister (and newlywed) Mary-Kate Olsen's blonde tresses.

We haven't seen this side of Olsen for about a decade—she was last seen working a darker shade of the spectrum back in 2006, and has been solid blonde ever since. Her return to brunette may not be as intense as the first time she tried out the shade, but it's gorgeous all the same and, not to mention, super-flattering against her complexion.

Get a closer look at Ashley's new hairdo, as well as more celebrity hair makeovers in our gallery!