Blake replaced the shot with an image of a profile a woman with the caption "NOT-THERE.ORG" in honor of International Women's Day Sunday. "What would happen if we weren't here... #internationalwomensday #genderequality #halfthesky See where we truly are at NoCeilings.org Let's own the change."
On the site, it reads, "We're Not There; On International Women's Day, the world woke up to find that many women were not there. This symbolic act reflected what a new analysis of women and girls' progress says about the state of gender equality: we're NOT THERE yet."
The Age of Adaline actress wasn't the only star swapping out her pic to make a statement about gender equality, though. Cameron Diaz also participated, posting the shot on Instagram along with the caption, "We're Not There...Yet. Inequality exists at work / at home / at the doctor's office / at school - and yet these issues do not get the attention they deserve. It's almost like we're NOT THERE at all."
"Today is International Women's Day and I am taking part in a campaign that literally removes women from the media," she continued. "You too can participate. Spread the word by changing your profile on Instagram, Facebook, Twitter, etc. and visit OurBodyBook.com @thebodybook for more information. #notthereyet #notthereaction #internationalwomensday @clintonfoundation."
Oscar winner Lupita Nyongo, Reese Witherspoon, Hillary Clinton, Jessica Alba, model Karlie Kloss, and more stars also removed their profile pics. Meanwhile, Cameron, Sienna Miller and Amy Poehler teamed up for a video for the cause, with none of them showing their faces on screen. Watch it here:
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Gallery | Women Who Are Making History