Lucky Blue Smith and Stormi Bree have welcomed their first child—a baby girl named Gravity Blue Smith. The model broke the news on Instagram early Thursday morning in a heartfelt post where he's holding his newborn daughter.

"She's here😍😍😍 meet Gravity Blue Smith, I've never felt so happy... I love you more than anything in this whole world little princess," Smith wrote in the caption.

Bree posted a similar photo on her own Instagram shortly after.

"Welcome to the world little angel, the most perfect beautiful gift I could have ever dreamed of 🖤little miss Gravity Blue Smith," she captioned the post of her, after delivery, in bed with Smith and their new baby.

Smith, 18, and Bree, 26, first announced they were expecting a child in early March. Later that month, the model told BAZAAR.com he was "very excited" to be a dad.

Congratulations to the happy couple!

Erica Gonzales is the Senior Culture Editor at ELLE.com, where she oversees coverage on TV, movies, music, books, and more. She was previously an editor at HarpersBAZAAR.com. There is a 75 percent chance she's listening to Lorde right now.