The 24-year-old took to Instagram on Monday to post a snap of himself holding brother Kevin‘s daughter in his arms with the words “I’m in love” written on the picture.
The proof of his feelings toward the newest Jonas family member was in his eyes. He lovingly looked down at Valentina as she curled up against his chest and slept.
His caption was simple but full of pride: “Valentina Angelina Jonas” complete with a heart emoji.
Before officially announcing their daughter’s arrival, proud uncle Nick took to Instagram to share his excitement over the birth.
“Congrats Kevin and Dani! We have another Jonas!! Can’t wait to meet that beautiful baby girl very soon,” he captioned a clip where he congratulated the new parents.
“We are excited to share the news that we are expecting a new addition to our family this winter,” the couple told PEOPLE exclusively at the time. “Alena is beyond thrilled to be a big sister and we can’t wait to meet the newest member of our family.”