Olivia Wilde CFDA - Lead 2016
Credit: Clint Spaulding/Getty

Olivia Wilde is proudly putting her baby bump on display with a purpose.

On Wednesday, the 32-year-old expectant star took to Instagram to share a gorgeous image of her growing baby bump. In the shot, Wilde rocks a coral-toned two-piece bikini with a wide-brimmed, ray-blocking hat as she stands on a field of grass and the sunlight shines down on her bare belly. But beyond the stunning photograph itself, the star is using the post to raise awareness about a cause.

“Join me today on #BumpDay to ask Congress to pass the #ReachAct so all moms have healthy pregnancies,” she wrote as the caption, adding “#bumpbumpbumptitupppp” as a funny sidenote. So what, exactly, is the Reach Every Mother and Child Act? In partnership with Save the Children, which Wilde is a regular supporter of, the new legislation would provide better treatment to those with limited access to health care and ultimately benefit 15 million children and 600,000 mothers, according to the nonprofit.

Most recently, Wilde also used the social media platform to rock her incoming second child—she’s already mom to 2-year-old Otis with beau Jason Sudeikis—in a bright yellow vintage dress.

Talk about fueling Instagram fun with a charitable message.