Allison Williams said goodbye to her Girls character Marnie with a new look in early 2017. The actress shared a photo of her new blonder locks writing: "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!" Photo: Instagram/@aw
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Olivia Wilde didn't just switch up her hair color to platinum blonde, she also chopped off several inches which she debuted on Instagram in February 2017. Photo: Instagram/@oliviawilde
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Niall Horan went in another direction coloring his hair dark brown in 2017. Photos: WireImage/Getty Images
