Nick Jonas is officially in love -- with his adorable new niece, Valentina Angelina Jonas!
The smitten uncle declared his affection in an Instagram pic sure to make hearts melt.
In a black-and-white snap posted on Monday, the 24-year-old "Jealous" singer proudly admires the two-week-old girl, whom his brother, Kevin, and wife Danielle, welcomed on Oct. 27.
"Valentina Angelina Jones ❤," Nick captioned the photo, on which he'd written, "I'm in love."
Nick was also the first confirm the happy news on Twitter, excitedly writing, ""AHH! I'm an uncle again!" following the birth.
Kevin and Danielle are also parents to 2-year-old daughter Elena Rose. The couple announced their second pregnancy in April and chronicled the labor in social media.
"Waiting is the hardest part," Kevin tweeted.
See more on baby Valentina in the video below.