By Mari Kasanuki
Mar 09, 2015 @ 11:01 am

Sunday was International Women's Day, and the stars took to Instagram to show their support for bringing greater awareness to gender equality.

"Happy International Women's Day! To all the incredible women I know and the ones I don't—I wish you opportunity, power and joy. I wish you courage in the fight. And I hope beyond hope that you get a nap once in awhile," Lena Dunham captioned a ’gram of herself as the iconic Rosie the Riveter (above).

Others celebrities including Cameron DiazBlake Lively, and Lupita Nyong'o replaced their account profile photos with and posted a blank silhouette of a woman (below) in support of the Not There campaign, a part of the Clinton Foundation’s No Ceilings: The Full Participation Project, which conveys the message that women are "not there" yet in reaching gender equality. And the ladies weren't the only ones taking up the cause: Gents Adrian Grenier and Derek Hough also shared touching posts (below) about what the day means to them. See all the Instagrams below.

Gwyneth Paltrow:

Shouldn't everyday be all of us equally day? I guess we're #notthere #internationalwomensday @iwd2015 @clintonfoundation

A video posted by Gwyneth Paltrow (@gwynethpaltrow) on


Taylor Swift:

We are at our best when we cheer each other on and build each other up. Happy International Women's Day.

A photo posted by Taylor Swift (@taylorswift) on


Cameron Diaz:


Kerry Washington:


Adrian Grenier:

Happy woman's infinity on this #womansday #springforward

A photo posted by Adrian Grenier (@adriangrenier) on


Allison Williams:


Blake Lively:


Naomi Campbell:

#internationalwomensday #keeponmoving 🌹🌹🌹💃💃🌹👊

A photo posted by Naomi Campbell (@iamnaomicampbell) on


January Jones:


A photo posted by January Jones (@januaryjones) on


Anne Hathaway:


Lupita Nyong'o:


Alicia Keys:


Kourtney Kardashian:

Each of them empower me daily just by watching them be who they are. 💪#internationalwomensday #teachyourchildren

A photo posted by Kourtney Kardashian (@kourtneykardash) on


Derek Hough:


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