Gold medal volleyball star Kerri Walsh Jennings has revealed she was pregnant at the Olympics this past summer.

The U.S. Olympian, who jumped and smashed her way to victory with longtime partner Misty May-Treanor, admits she discovered she was expecting shortly after returning home from London.

"When I was throwing my body around fearlessly, and going for gold for our country, I was pregnant, and today I'm 11 weeks pregnant," she told American breakfast show Today.

And she confesses she had her suspicions.

"I'm a pretty happy girl and I was unreasonably moody. I thought it could have been the stress of the games and travel kind of throws your schedule off, but I knew. At some point, you're late and then you start feeling something. And I definitely started feeling something in London."

Jennings and her husband Casey already have two sons, Joey, three, and two-year-old Sundance.