Kevin Jonas is officially a father to a baby girl, E! News reported Sunday.

The former boy bander's wife, Danielle, gave birth to the couple's first daughter and said, "We are overjoyed at the birth of Alena Rose Jonas. She is precious! We could not be more excited to start building our family together. We want to thank our family and friends for their love and support, and our fans for all of their well wishes."

Early Sunday around 9AM, Kevin announced the news that Danielle was in labor on Twitter. He wrote, "Baby Jonas is on the way!! It's showtime #thisisnotadrill"

He also posted a picture on Instagram of her monitor at the hospital before tweeting his excitement.

Kevin gave fans a play by play and tweeted again at 11:42 AM "Here we go we're pushing!!!! #babyjonas"

Once Alena Rose was born, he Retweeted a picture of Danielle holding her. It had the caption, "On this day, a little star was born."

Kevin's brother, Joe, also took to social media to share his joy.

Sunday night he Joe also paid homage to their uncle whose funeral was Saturday, and his first niece.

He tweeted, "As one life ends, another begins. Incredibly happy to be an uncle for the first time. Welcome to this world my beautiful niece."

Joe even posted a silly picture of himself with an artificial belly bump Saturday.

He included the caption, "Can't wait. #unclejoe"

Their younger brother, Kevin Jonas, joined in and tweeted, "My grandfathers memorial was yesterday. Today we welcome a new addition to the Jonas famiy. God is great. Can't wait to meet my new niece."

Kevin and Danielle broke the news that they were expecting their first child in July.

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

The new parents married on Dec. 19, 2009 in Long Island, N.Y. before starring in the E! hit reality series Married to Jonas.

Tags: Kevin Jonas