Dreft laundry detergent, which announced the birth, shared the first photo of the father-daughter duo on Wednesday.
The caption reads, “Alena Rose looks like a little star in her daddy's arms. @KevinJonas #BabyJonas”
In the snapshot, Jonas, 26, is cradling his newborn, wrapped in a blanket and wearing a pink cap. "My beautiful girl so proud to be a dad. Alena Rose has stolen my heart," he wrote.
Kevin’s brothers Joe and Nick were also excited to welcome a new member of the Jonas family. Their grandfather, Jerry Miller, died January 28.
Nick tweeted, "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."
Joe also wrote of Alena’s birth, "As one life ends, another begins. Incredibly happy to be an uncle for the first time. Welcome to this world my beautiful niece."