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Holly Madison
The author and former Girls Next Door star marched in Las Vegas.
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George Pimentel/Getty Images
John Legend
The singer is all smiles while marching in Park City, Utah.
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Naomi Watts
The actress looks out at the sea of protesters at the Women's March in the Big Apple.
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Michael Loccisano/Getty Images
Charlize Theron & Mary McCormack
The two join protesters in Park City, Utah.
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George Pimentel/Getty Images
Maria Bello
The actress appears at the Women's March in Park City, Utah.
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Evan Rachel Wood & Halsey
The Westworld star posted this photo on Instagram from the Washington, D.C. march.
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Demi Lovato & The Edge
The pop singer and U2 guitarist gear up for their performance at the Los Angeles-based event.
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Pink
The singer marches with her family, including her newborn son, in Los Angeles.