Jon Bon Jovi is one proud "Papa" to his first grandchild. "Immediately, you fall in love," Bon Jovi, 63, gushed during his Thursday, October 23, appearance on Today. "When we met Jake and Millie's daughter, it was just immediate, like, 'That's my granddaughter,' and it's cool, you know?" Bon Jovi's son Jake Bongiovi announced in August that he and wife Millie Bobby Brown welcomed their first child via adoption. (Bongiovi, 23, and Brown, 21, have not publicly revealed their baby's girl name or shared a full photo.