Donald Trump's presidency is bad news for so very, very many people.
All the people, basically.
But one group -- one entire gender, actually -- banded together on Saturday, January 21st, in protest.
We're speaking, of course, about the Women's March.
Women came together in Washington D.C., in Los Angeles, in Chicago, and in so many other major cities, and in some not-so-major cities as well.
It was a beautiful sight to see, and so now let's see what the celebrities did to honor the occasion!
Katy Perry, one of Hillary Clinton's biggest supporters, marched in Washington.
Scarlett Johansson spoke in support of Planned Parenthood.
Supergirl actress Melissa Benoist got in on the action with this amazing sign.
Nick Offerman, best known for playing Ron Swanson on Parks and Recreation, got himself a popular "pussy hat."
Helen Mirren looked just as classy as ever at the protest in New York.
Sex and the City star Cynthia Nixon went out to march in New York as well.
Gillian Anderson marched all the way across the ocean in London.
Mandy Moore rocked a pussy hat, as well as an incredibly appropriate shirt.
Bella Thorne was being especially Bella Thorne-y in Washington.
Laura Prepon posed next to a sign that is real AF.
Jake Gyllenhaal was not about Trump's nonsense.
Kristen Stewart stood with Planned Parenthood in D.C.
Taylor Schilling, star of Orange is the New Black, got real punny.
Debra Messing accompanied a bus full of ladies to D.C. -- note the hats!
Lena Dunham had special shirts made for the Women's March -- what dedication!
You can tell how serious Jessica Chastain is because of all the badges.
Chelsea Handler marched with friends at Sundance.
Charlize Theron also repped her gender at Sundance.
Olivia Wilde (and Jason Sudeikis!)
Olivia Wilde and Jason Sudeikis took their lovely selves out to march, too.