New father Kevin Jonas’ brothers and former Jonas Brothers bandmates, Joe and Nick Jonas, have spoken out about their new niece. Kevin’s wife, Danielle Jonas, gave birth to a baby girl named Alena Rose on Sunday, Jan. 2.

While the proud new dad was beaming on his own Twitter account, his brothers were doing the same on their own. The birth of baby Alena came just days after their grandfather passed away, which they mentioned in their posts.

Middle brother, Joe, took to Twitter and wrote, “As one life ends, another begins. Incredibly happy to be an uncle for the first time. Welcome to this world my beautiful niece.”

Youngest brother, Nick, wrote, “My grandfathers memorial was yesterday. Today we welcome a new addition to the jonas family. God is great. Can't wait to meet my new niece.”

Meanwhile, Kevin gushed about his new daughter, “I'm so in love with her.”

Married to Jonas stars Kevin and Danielle have been married since 2009 and announced they were expecting their first child back in July.

They said in a statement after she gave birth, "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."

image: NBC