What is #MeToo and why it's the most important thing you'll see in your newsfeed today.

#MeToo.

With these two simple words, thousands of women – and men – are uniting to highlight just how widespread sexual harassment and assault are.

On Sunday night, Charmed actress, Alyssa Milano called for women from all walks of life to stand in solidarity in response to the barrage of actresses and women in media coming forward with their stories of sexual harassment, assault, and even rape at the hands of disgraced Hollywood producer, Harvey Weinstein.

“If you’ve been sexually harassed or assaulted write ‘me too’ as a reply to this tweet,” the 44-year-old posted to Twitter.

If you’ve been sexually harassed or assaulted write ‘me too’ as a reply to this tweet. pic.twitter.com/k2oeCiUf9n

— Alyssa Milano (@Alyssa_Milano) October 15, 2017

Since the tweet was posted, tens of thousands have replied to Milano’s call alone, with many more sharing their stories in individual posts.

Among these are celebrities including Lady Gaga, Gabrielle Union, Sheryl Crow, Sarah Hyland, Busy Philipps, Viola Davis, Barry Crimmins, Anna Paquin, Patricia Arquette, Debra Messing, Rosario Dawson and Evan Rachel Wood.

#MeToo

— xoxo, Gaga (@ladygaga) October 15, 2017

This. #MeToo https://t.co/oYiyeMxvuy

— Gabrielle Union (@itsgabrielleu) October 15, 2017

#metoo A manager on my first big tour as a backup singer. When I went to a lawyer he told me to suck it up bc the guy could do a lot for me.

— Sheryl Crow (@SherylCrow) October 16, 2017

You are not alone. #MeToo

— Sarah Hyland (@Sarah_Hyland) October 16, 2017

It’s funny. I just figured it goes without saying. #MeToo

— Busy Philipps (@BusyPhilipps) October 16, 2017

Me too. Suggested by a friend: “If all the women who have been sexually harassed or assaulted wrote “Me too” as a status, we might give people a sense of the magnitude of the problem.”

A post shared by Viola Davis (@violadavis) on Oct 16, 2017 at 3:15pm PDT

As a male childhood rape survivor who has gone public and had so many disclose to me, I promise: any rape stat you see is low. #MeToo

— Barry Crimmins (@crimmins) October 15, 2017

Me too

— Anna Paquin (@AnnaPaquin) October 15, 2017

#MeToo

— Patricia Arquette (@PattyArquette) October 15, 2017

Me too https://t.co/ScX67Kmmiy

— Debra Messing (@DebraMessing) October 15, 2017

All too pervasive… Me too. #MeToo #TogetherWeRise https://t.co/ju5K3USDt8

— Rosario Dawson (@rosariodawson) October 16, 2017

Because I was shamed and considered a “party girl” I felt I deserved it. I shouldnt have been there, I shouldn’t have been “bad” #metoo

— #EvanRachelWould (@evanrachelwood) October 16, 2017

Whether you’re reading it, scrolling past it, tweeting it, or perhaps, the reason someone else is, the message is clear:

You are not alone. And this will no longer be tolerated.

LISTEN: Mia Freedman, Jessie Stephens and Rachel Corbett discuss Harvey Weinstein…

If you or someone you know is experiencing sexual or domestic abuse, please contact 1800 RESPECT. If you are in immediate danger, call 000.