Katy Perry, Cher to join anti-Trump women's march
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Katy Perry leads a host of female celebrities who will participate in a women's march to protest President-elect Donald TrumpDonald John TrumpLawmakers prep ahead of impeachment hearing Democrats gear up for high-stakes Judiciary hearing Warren says she made almost M from legal work over past three decades MORE next week that's expected to draw hundreds of thousands of people.

Cher, Scarlett Johansson, Julianne Moore, Amy Schumer and others will also join the nationwide Women’s March on Washington on Jan. 21, organizers announced Monday.

Event organizers expect around 200,000 women to participate in the Washington, D.C., march that will be held just one day after Trump’s inauguration. And more than 270 related marches will take place across the U.S. and globally.

It’s unclear which cities Perry, Johansson and others will march in.

America Ferrera, best known for her leading role in television’s “Ugly Betty,” will head the artists’ committee for the march. Ferrera campaigned for Democratic nominee Hillary ClintonHillary Diane Rodham ClintonWill the Horowitz report split the baby? Gabbard commemorates John Lennon's passing by singing 'Imagine' Bannon: Clinton waiting to enter 2020 race and 'save the Democratic Party from Michael Bloomberg' MORE during the presidential election.

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Perry, also a vocal Clinton supporter, performed at Clinton rallies during the campaign, and her song “Roar” was used in one of Clinton’s campaign ads.

Feminist icon Gloria Steinem and singer and social activist Harry Belafonte will serve as co-chairs to the march, the organizers announced last month.

Other celebrities expected to attend the march include Debra Messing, Olivia Wilde, Uzo Aduba, Frances McDormand and Chelsea Handler — who will lead the march in Park City, Utah.

Plans for the march began to form immediately after Trump's win in November. Event organizers say the marches will make a "bold message" on what will be the first full day of Trump's presidency. 

"The Women’s March on Washington will send a bold message to our new government on their first day in office, and to the world that women's rights are human rights," the organizers wrote on their website. "We stand together, recognizing that defending the most marginalized among us is defending all of us."