Thousands of women have since responded with heartbreaking accounts of sexual harassment and assault, including famous faces Debra Messing, Anna Paquin and Rosario Dawson.
You can read some of the many #MeToo tweets that have gone viral below. And the posts are not just confined to Hollywood - if you take a look at your own social media feed you will probably see friends or family raising their own voices.
Writer Alexis Benveniste reminded Twitter users that just because a woman "didn't post #MeToo, it doesn't mean she wasn't sexually assaulted or harassed". She added: "Survivors don't owe you their story".
Meanwhile, comedian Aparna Nancherla shared her hope that the dialogue soon shifts from #MeToo to “I believe you.”
We do too.
