Amber Tamblyn and Amy Schumer
Tamblyn wore a Planned Parenthood hat while Schumer dressed as a NASA astronaut for the march.
Amy Poehler and Samantha Ronson
Poehler also marched in Washington and posed for a selfie with Tamblyn and Samantha Ronson.
Gillian Anderson
Gillian Anderson participated in the Women's March in London.
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Helen Mirren
The Oscar winner participated in the Women's March in New York City.
Felicity Huffman
Felicity Huffman brought women of multiple generations to the march in Washington.
Debra Messing
Debra Messing wore a pink "pussy hat" on her way to the Women's March on Washington.
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Jackie Cruz
The Orange Is the New Black star and her friends brought bilingual signs.
Melissa Benoist
The Supergirl star used her powers for good with a sign only she could carry.
Josh Gad
The Frozen star marched in London on Saturday.
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Ashley Judd
Ashley Judd talks to participants at the Women's March on Washington.
Ariana Grande
Ariana Grande posts a Boomerang on the way to the march.
Chelsea Handler, Maria Bello, Charlize Theron
Chelsea Handler, Maria Bello, and Charlize Theron at the Women's March on Main Street in Park City, Utah
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John Legend
John Legend attends the Women's March on Main Street in Park City, Utah.
Laura Dern
Laura Dern protests at the Women's March on Main Street in Park City, Utah.
Laura Prepon
The Orange Is the New Black star participated in the Park City march, which coincided with the Sundance Film Festival.
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Jane Fonda and Miley Cyrus
Jane Fonda and Miley Cyrus participated in the Women's March in Los Angeles.
Kristen Stewart
Kristen Stewart showed her support for Planned Parenthood at the Women's March on Main Street in Park City, Utah.
Helen Hunt and Mandy Moore
Helen Hunt and the This Is Us actress ran into each other at the Women's March in Los Angeles.
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Jenny Slate
Actress Jenny Slate held up a sign that read "Quit 'Putin' Your Paws On My Pussy" at the Women's March on Main Street in Park City, Utah.
Fran Drescher, Rev. Jesse Jackson, Alicia Keys
Fran Drescher, Rev. Jesse Jackson and Alicia Keys posed for a photo together at the rally at the Women's March on Washington.
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