Even before it stars, the Women's March on Washington has already drawn quite the crowd.
On Jan. 21, one day after President Donald J. Trump's inauguration, people all across America will join together to advocate for women, minorities and the LGBTQ community in the new administration -- a few famous faces included.
WATCH: Beyoncé Speaks Out in Support of Women's March on Washington: 'We Can Make Our Voices Heard'
Stars like America Ferrera, Ashley Judd and Scarlett Johansson will be speaking at the event, starting at 10 a.m. in Washington D.C., while Janelle Monae and Samantha Ronson are scheduled to perform.
Other notable celebs at the event's "artists' table" -- attending either in person or via social media -- include Katy Perry, Uzo Aduba, Patricia Arquette, Taylor Schilling, Sophia Bush, Rose McGowan, Robert DeNiro, Paul Rudd, Mark Ruffalo, Jessica Chastain, Connie Britton, Christina Hendricks, Amber Tamblyn, Cher, Maggie Gyllenhall, Danielle Brooks, Lupita Nyong'o, Padma Lakshmi, Stephanie March, Debra Messing, Frances McDormand, Julianne Moore, Katy Perry, Julianne Moore, Amy Schumer, Olivia Wilde, Constance Wu, Zendaya, Questlove and Lena Dunham.
Chrissy Teigen announced on Friday morning that she will also be in attendance at the event after "feeling compelled to support my fellow women."
WATCH: The Obamas Are the Most Adorable as They Officially Exit the White House -- See the Pics
Blackish star Yara Shahidi will be attending the Women's March on Los Angeles, where Rowan Blanchard will be speaking, and Chelsea Handler will be leading the March on Main in Park City, Utah.
Outlander star Caitriona Balfe will be joining the movement from Scotland, while other stars like Beyoncé expressed their support for the cause over social media.
WATCH: Chrissy Teigen Cancels Plans to Support John Legend at Sundance to Attend Women's March on Washington