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Olivia Wilde has gone to the dark side! The Revlon brand ambassador kissed her sun-kissed ombré hair goodbye in favor of a more fall-friendly rich chocolate hue. This is just the latest experimental color for the Butter star, who changed her hair all year long. In January, she chopped her strands into a shoulder-grazing bob, then dyed her locks honey-blond for a movie role before working an ombré style as of late. Tell us: Do you like her new color?

Plus, see more celebrity hair makeovers!

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