Joe Jonas holds niece Alena Rose Jonas for the first time. Credit: Courtesy Joe Jonas

Alena Rose Jonas is only 4-days-old and already has some A-List celebs visiting her -- namely, her uncles! The newborn, who Kevin and Danielle Jonas welcomed on Sunday, Feb. 2, has melted hearts in the Jonas clan. And on Wednesday, Feb. 5, Kevin's  brother Joe Jonas held his niece for the first time. 

"Welcome to this world Alena Jonas. #littlebaby #shessosmall #woah," Joe, 24, captioned a photo of himself holding the tiny tot. 

Not to be outdone, Kevin's younger brother Nick Jonas is en route to visit his niece as well. 

"I get to meet my niece Alena Rose tomorrow.. I'm so excited @kevinjonas @daniellejonas," Nick tweeted on Feb. 5. 

The 21-year-old musician has been helping friend and fellow former Disney star Demi Lovato produce her Neon Lights Tour, but was happy to take a break for the Jonas family's latest addition. 

As for Alena's proud papa, Kevin, 26, has posted several photos on social media holding his infant daughter. And on Feb. 6, he Instagrammed a shot of his wife Danielle cradling Alena with the family dogs around them. 

"All my girls #soblessed," Kevin captioned the photo. 

Though the Jonas Brothers band suffered a very public, seemingly final breakup in October 2013, the siblings remain close. 

"We're family first and that's always been our main priority and so honesty within what we do as a group was really important," Nick explained on Good Morning America shortly after their breakup.