By Kelsey Glein
Updated Apr 18, 2016 @ 3:00 pm
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Credit: Jamie McCarthy/Getty Images

Surprise! Olivia Wilde and Jason Sudeikis are expecting their second child together.

The actress took to Instagram today to announce the news, sharing an adorable photo of her budding baby bump. In the snap, Wilde poses in a swimsuit and oversize button-up shirt alongside her and Sudeikis's 1-year-old son Otis, who turns two this week. The mother-son duo smile as they show off their bare tummies.

"Matching baby bumps," Wilde captioned the too cute picture.

But when can we expect wedding bells for the engaged pair? The actor stopped by Watch What Happens Live last week, where he jokingly revealed that they plan to tie the knot: "I believe that we won't get married until weed is legal in every state, gosh darn it!"

Congratulations to the growing family—we couldn't be happier for them!