Famous white actresses including Gwyneth Paltrow, Julia Roberts and Hilary Swank are among those handing over their social media platforms Wednesday in order to amplify black female voices.

As part of the #ShareTheMicNow campaign, 46 black women will take over the Instagram accounts of 46 white women, with a total audience reach of 300 million.

The campaign was thought up by Endeavor executive Bozoma Saint John, best-selling authors Luvvie Ajayi Jones and Glennon Doyle and fashion designer Stacey Bendet.

The organizers told The Hollywood Reporter their goals are: "To form a social media campaign that magnifies black women’s lives and stories. To form relationships among black women and white women - so that our future activism is born from relationships. To create a network of disruptors who know and trust each other. To create action that could make change."

"Pose" star and transgender activist Angelica Ross will be taking over Swank’s page, fashion and beauty editor Kahlana Barfield Brown will team up with Roberts and Mama Glow founder Latham Thomas will work with Paltrow.

Saint John will be taking over Kourtney Kardashian’s platform, #MeToo founder Tarana Burke partners with Doyle, Jones will be posting to Sophia Bush’s page and Benet hands over her page to Cosmopolitan beauty director Julee Wilson.

Others who will be sharing their Instagram accounts include Debra Messing, Busy Philipps, Chelsea Handler, Ashley Graham, Julianne Hough, Sarah Paulson and more.

"When the world listens to women, it listens to white women," according to a statement on the campaign's Instagram channel. "For far too long, Black women’s voices have gone unheard, even though they’ve been using their voices loudly for centuries to enact change."

"Today, more than ever, it is NECESSARY that we create a unifying action to center Black women’s lives, stories, and calls to action. We need to listen to Black women," the statement continued. "This is why we created #ShareTheMicNow."

Check out some of the #ShareTheMicNow content below: