Olivia Wilde definitely has that pregnancy glow!
The 32-year-old actress, currently expecting her second child with fiance Jason Sudeikis, took to Instagram to share a snap of herself showing off her growing belly -- and rocking a makeup-free face -- all in support of a good cause.
WATCH: Olivia Wilde Shows Off Growing Baby Bump in Black Bikini
"Join me today on #BumpDay to ask Congress to pass the #ReachAct so all moms have healthy pregnancies. Link in bio. @savethechildren," she wrote on Wednesday, along with the adorable pic of herself and the hashtag #bumpbumpbumpitupppp.
The Vinyl star is clearly enjoying her second pregnancy, often posting pics of her growing bump to her Instagram.
"What to do when you look like Homer Simpson at Little Miss Sunshine? Chill the f out," she posted last week, along with a shot of herself rocking a vintage yellow dress.
And who can forget the adorable snap she posted of herself cracking some eggs in the kitchen?
RELATED: Olivia Wilde and Jason Sudeikis Are 'Top Notch Swim Coaches' During Pool Time With Son Otis -- See the Pic!
Wilde and Sudeikis, already parents to 2-year-old son Otis, definitely seem excited to welcome baby No. 2.
ET recently caught up with the 40-year-old actor, who couldn't help but gush about his growing family.
"I think a lot of it has to do with being with the right person, but also I think we did a humdinger of a job on the one we got," he said of Otis. "He is very cute and he's very, very fun and smart. It's been fun getting to know him."
See more in the video below.