Celebrity Transformations Zosia Mamet's Changing Looks By InStyle Editors InStyle Editors Facebook Instagram Twitter Our editors and writers comprise decades of expertise across the beauty, fashion, lifestyle and wellness spaces in print and digital. We prioritize journalistic integrity, factual accuracy, and also having fun with every story we share. InStyle's editorial guidelines Updated on January 27, 2016 @ 02:59PM Pin Share Tweet Email Trending Videos Photo: C Flanigan/FilmMagic Zosia Mamet's Changing Looks 01 of 18 2012 Kristina Bumphrey/Startraksphoto For the N.Y.C. premiere of Girls, Mamet let down her waves and highlighted her lips with pale peach gloss. 02 of 18 2012 Andrew Toth/PatrickMcMullan.com/Sipa USA She paired bold brows with bright crimson lips for a screening of Savages. 03 of 18 2012 CelebrityPhoto For the Emmys, Mamet glowed with barely there makeup and a slicked-back hairstyle. 04 of 18 2012 Stephen Lovekin/Getty Images Mamet opted for a natural hair and makeup look to attend an N.Y.C. event. 05 of 18 2012 Astrid Stawiarz/Getty Images Mamet paired her long, loose hair with a bold lip on opening night of Broadway's The Anarchist. 06 of 18 2013 Andrew H. Walker/Getty Images For the season premiere of Girls, Mamet channeled Hepburn with a topknot and bold red lipstick. 07 of 18 2013 Jamie McCarthy/Getty Images Mamet debuted flaxen strands at the N.Y.C. preview for Really Really, an off-Broadway play in which she starred. "I had never dyed my hair in my life," she told the Associated Press. "The idea of dyeing it for the first time when I'm doing [my first] play felt great!" 08 of 18 2013 Daniel Zuchnik/FilmMagic By June, Mamet had returned to a darker hue. She was photographed at the New York premiere of The Heat with dark brown wavy tresses. 09 of 18 2013 Dimitrios Kambouris/WireImage After the Girls actress's first dye job, she kept coming back for more! She attended the Blue Jasmine New York premiere with golden strands. 10 of 18 2014 FilmMagic/FilmMagic First color, then a cut! Mamet chopped off her long tresses and debuted an edgy bob at a Golden Globes after-party. 11 of 18 2014 Chelsea Lauren/Getty Images Talk about a transformation! Mamet's platinum blonde bob was the talk of the town at New York Fashion Week. 12 of 18 2014 Brad Barket/Getty Images Mamet took her love of hair transformations to a new level, stepping out with a gray bob and dark roots. 13 of 18 2015 Jason LaVeris/FilmMagic The star channeled Old Hollywood glamour at the 2015 Golden Globes. She styled her honey-colored strands in face-framing curls with an exaggerated side part. 14 of 18 2015 D Dipasupil/Getty Images Not one to shy away from color, Mamet added a new shade into her arsenal: pink! 15 of 18 2015 Jennifer Graylock/Getty Images In another first for the Girls actress, she stepped out in April with a new pair of bangs. 16 of 18 2015 Jamie McCarthy/WireImage Just two months later, Mamet's long bangs had grown into face-framing angles. She rocked a wavy blonde bob at the New York premiere of Trainwreck. 17 of 18 2015 Taylor Hill/FilmMagic Mamet added drama to her blonde updo with dark roots at the He Named Me Malala premiere in September. 18 of 18 2016 C Flanigan/FilmMagic Holy highlights! Mamet showed off lighter blonde 'do at the Sundance Film Festival.