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The Jonas Brothers are welcoming a new addition to the family.  Sunday brought the birth of Kevin Jonas' first child - a daughter named Alena Rose Jonas. 

Kevin live-tweeted his wife Danielle's long day of labor.  He later wrote that he's already "so in love" with his daughter. 

Kevin seems to have the full support of his brothers behind him, despite having split up   musically last year.  On Saturday, the Jonas family held a memorial for their recently passed grandfather. 

Kevin's brother Joe tweeted:

Youngest brother Nick added that he "can't wait" to meet his new niece. 

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