Kevin and his wife, Danielle, exclusively reveal to E! News that they're having a baby. Hear from the excited daddy-to-be.

Kevin Jonas and his wife, Danielle, are expecting their first baby, the eldest of the JoBros announced Tuesday.

"It's true @daniellejonas is pregnant!," the father-to-be tweeted. "can't even imagine how excited we are I can't wait to share this with my best friend. I love you baby."

Dani chimed in as well, tweeting, "I am so happy to tell everyone it's been so hard keeping this news in !!!"

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The effusiveness continued as the 25-year-old singer did a Skype interview with E! News.

"I was overjoyed," Kevin told E!'s Giuliana Rancic. "It's been the most exciting thing in my life so far." He was nervous as well, he admitted.

The couple got married in December 2009.

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