Olivia Wilde is expecting a baby boy.

The 29-year-old actress - who is six months pregnant with her first child with fiance Jason Sudeikis - let the tot's gender slip as she revealed he is extremely active during the 71st Annual Golden Globes on Sunday. "He was kicking the whole time, going, 'Where are we?!'" she said.

The blonde beauty - who had covered her bump in a sparkling Valentino gown for the ceremony - is embracing her pregnancy curves: "It's great I've never had boobs before!"

And the Her star admitted she is glad her bump is becoming more prominent. "Until about a week ago, I just looked fat! I wanted to be like, 'I'm not fat, I'm pregnant!'" she told People.

While Olivia loved the green gown she donned for the awards, not everyone was a fan. "I just heard someone say I looked like a giant, walking pickle last night at the Globes. As a pickle enthusiast, I thank you," she tweeted.