Time to paint the nursery ... blue!

Olivia Wilde and Jason Sudeikis are expecting a boy.

The actress revealed the happy news during a red carpet interview at the Golden Globe Awards on Sunday night.

The brunette beauty, who's due on May 4, is embracing her growing baby bump.

"Until about a week ago, I just looked fat!" she told People magazine. "I wanted to be like, 'I'm not fat, I'm pregnant! ... It's great, I've never had boobs before!"

Jason and Olivia started dating shortly after they met on the set of "Saturday Night Live" back in 2011. They got engaged in January.

We are so excited for the happy couple, and we can't wait to see what their little bundle of joy looks like when he gets here!

Click "Launch Gallery" above to see even more expecting stars!

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