Kevin and Danielle Jonas expecting first child

Kevin and Danielle Jonas are officially expecting. The eldest member of the Jonas Brothers confirmed that his wife is pregnant with their first child.

Kevin announced the news on Twitter, spreading the word of a bonus Jonas to family, friends and fans:

"I was overjoyed," Kevin, 25, told E! about the news. "It's been the most exciting thing in my life so far. I'm excited and I'm nervous."

Kevin was 22 years old when he married Danielle in December 2009. They met in the Bahamas in 2007, and after dating for two years, tied the knot at Oheka Castle in Long Island, New York.

Kevin and Danielle star in their own reality series on E!, "Married to Jonas."

"Married to Jonas," currently in its second season, invites viewers into the world of Kevin and Danielle, chronicling the challenges and rewards of married life. The series follow Kevin as he finishes a new album and tours with his brothers, and Dani as she starts her own business.

While it's unclear if there will be a season 3 of "Married to Jonas," there would be a lot more to see with the addition of another cast member.