Girls’ Zosia Mamet Goes Blonde

Zosia Mamet attends the "Really Really" Press Preview on January 10, 2013 in New York City. Cindy Ord/

Perhaps blond Girls have more fun?

Zosia Mamet, 23, who plays the earnest, over-eager, fashion-loving Shoshanna on the runaway hit Girls, has dyed her trademark chestnut hair strawberry blonde.

She lightened up for a role in Paul Downs Colaizzo's Really Really, opening Off-Broadway Jan. 31, a comedy about friends in the aftermath of an especially raucous party.

"I had never dyed my hair in my life," she said in an interview with The Associated Press. "The idea of dyeing it for the first time when I'm doing a play for the first time felt great!"

Even though her father is renowned playwright David Mamet, the unconventionally pretty actress hasn't had a particularly easy time breaking into the acting business. She recalled casting appointments, when "the look on those people's faces was one of confusion: 'What WAS that?" Sometimes a director or a writer or a casting director would fight for me, but the producer or studio executive would be like, 'No! We can't sell her.' "

PHOTOS: See Christina Aguilera's hair evolution

Her father was always supportive, though. "My father always said, 'Don't listen to anything after 'No,' because they don't know what they're talking about."

Sign up now for the Us Weekly newsletter to get breaking celebrity news, hot pics and more delivered straight to your inbox!

Want stories like these delivered straight to your phone? Download the Us Weekly iPhone app now!