Tens of thousands of women are expected to march down the streets of Washington, D.C., on Jan. 21, just a day after Donald Trump takes over as the president of the United States. A number of celebrities will be joining the protest touted as the biggest of the over 200 planned for the day.

“Roar” hitmaker Katy Perry, “Replay” singer Zendaya, “Orange is the New Black” star Uzo Aduba and Scarlett Johansson are some of the big names that are expected to march alongside both men and women who are fighting for human rights, civil liberties and diversity. 

“The Women’s March on Washington aims to send a message to all levels of government and the incoming Presidential administration, that we stand together in solidarity and expect elected leaders to act to protect the rights of women, their families and their communities,” Women’s March officials said in the statement about the march that will begin at 10 a.m. EST, and continue down the intersection of Independence Avenue and 3rd Street.

“I am marching on Washington to let our next president know that we, men and women alike, will not stand down or be silenced and will fight to protect our bodies and our choices,” “Lucy” actress Johansson said in a statement published by People magazine.

Amy Schumer, Padma Lakshmi, Constance Wu, Patricia Arquette, Danai Gurira, Padma Lakshmi, Lea DeLaria and Diane Guerrero are also expected to take part in the Washington edition of the march.

The Sundance Film Festival at Park City, Utah, will also see a similar protest led by comedian Chelsea Handler. “Sundance has always been a platform for change: not only for filmmakers and filmmaking, but also for big ideas for the future,” Handler reportedly said. “If there’s anything I learned in the last year, it’s that we need to be louder and stronger than ever about what we believe in, so I joined some incredible women from around the country to bring our voices together in the streets of Park City.”