In addition to writers, artists and activists from diverse backgrounds sharing their work and experiences, a number of celebrities also used their Hollywood clout to raise awareness for a wide range of issues.
Scarlett Johansson spoke and marched in Los Angeles alongside Mila Kunis and used her time at the mic to specifically call out James Franco.
"My mind baffles — how could a person publicly stand by an organization that helps to provide support for victims of sexual assault while privately preying on people who have no power," she said to the crowd. "I want my pin back by the way," she added, referencing Franco's decision to wear a Time's Up pin to the Golden Globes and publicly support the movement despite allegations of sexual misconduct against him.
Watch Scarlett Johansson call out James Franco at the Women's March pic.twitter.com/rCoFJORWdJ— NowThis (@nowthisnews) January 22, 2018
Natalie Portman also attended the march in Los Angeles, speaking to the crowd about her experiences of "sexual terrorism" at an early age — condemning "rape fantasy" fan mail and euphemistic media countdowns to her 18th birthday.
Natalie Portman said experiencing "sexual terrorism" at the age of 13 made her feel the need to cover her body and inhibit expression while addressing thousands in LA gathered for the Women's March https://t.co/G6ZlWlxSuB pic.twitter.com/hDBkTEHCod— CNN (@CNN) January 22, 2018
Halsey, meanwhile, attended the march in New York. She shared a poem dubbed "A Story Like Mine," detailing her own experiences with rape and sexual assault.
Viola Davis spoke powerfully to the marchers in Las Vegas, speaking in support of victims of assault who have been silenced and encouraging others to stand up for the rights of those without a platform.
And back at the LA women's march, Viola Davis is now addressing the crowd https://t.co/Kh2niSEh8E— Meg Wagner (@megwagner) January 20, 2018
Plenty of other celebs also attended marches and rallies around the United States and the rest of the world. See a selection of social media posts from the Women's March below.
The most influential people in my life have always been women. My family, my friends, my teachers, my colleagues, and my idols. I am obsessed with all the women in my life. I adore them and need them more and more every day. I am so grateful to be a woman, I wouldn't change it for the world. I hope I'm not only defined by my gender though. I hope I'm defined by my input to the world, my ability to love and to have empathy. To raise my son to be a a good man alongside the good man who loves me for everything I am and am not. I want what's best for people, I think we all do. We just can't agree on what that is. Power to the peaceful, power to the people x #womensmarch2018