The couple named the baby girl Finley Elaine Griffin, the NBA star's rep confirmed to ET on Thursday.
Finley joins 3-year-old brother Ford Wilson Cameron-Griffin, who just had a birthday last month. While this marks the second child for the couple, Finley is Cameron's third child. She has a 9-year-old son, Cole, with former NFL quarterback, Matt Leinart.
The NBA All-Star dished on how much parenthood has changed him in a recent interview with GQ.
"This is what everybody says, and I didn't really get it," Griffin said. "People were like, 'Oh, it's so life-changing. It makes you think about things in a different way,' and you're always like, 'Oh yeah, totally.' But then, when it happens, you're like, 'Woah. All of those people were right!'"