Nick Lachey and Vanessa Minnillo

Nick Lachey and Vanessa Minnillo are expecting their first baby, Lachey announced Monday morning on Live! With Kelly.

"[Vanessa] started to feel a little different, not herself, so she went to the store, got a pregnancy test, and it came back positive. So we are having a baby!" Lachey, 37, said. "I've had a chance to do a lot of great things in my career and my life but this is the one thing that, more than any other, I look forward to. The fact that it's actually here, it's overwhelming."

Although Minnillo, 31, has yet to comment, she tweeted a hint to her followers: "Good Morning! Don't forget to watch @LiveKelly today! @NickSLachey is co-hosting and they have surprises!"

Nick Lachey and Vanessa Minnillo are married

The couple began dating in 2006 and tied the knot in July with a small, tropical island ceremony that was televised on TLC. Lachey was previously married to Jessica Simpson, who is also expecting her first child with fiancé Eric Johnson.