Blonde Bombshell! Allison Williams Ditches Her Signature Brunette Hair & Goes Platinum

Lookin' good, girl! Allison Williams is ditching her signature brunette locks to jump on the blonde bandwagon.

The Girls star showed off her fab new 'do in a series of Instagram images, and we think she looks great!

“Here it is IRL. Still getting used to it, but I dig it. Thank you @auracolorist and @rebekahforecast for helping me say goodbye to Marnie — and to @allure for the nudge!” she shared in her post, giving a shout out to her stylists.

Williams' transformation comes just in time for the star to say goodbye to her character Marnie on the hit HBO show, which will air its sixth and final season this year.

Girls premieres on HBO on Feb. 12.

What do you think of Allison's fresh blonde locks? Let us know in the comments section!