Matt Damon, Wife Luciana Welcome Baby Girl!

Say a prayer for Matt Damon today. Guy now has four daughters!

That's gonna be real fun in about a decade, Matt. Just saying, good luck to you! We kid ... mostly. He and wife Luciana welcomed #4 this week in New York.

Stella Zavala Damon was born on Wednesday! 

Matt and Luciana Damon have their hands full!

All is well on the home front, too: "Mom and baby are both healthy," a representative for the Hereafter star said this weekend. "The whole family is thrilled."

Matt, 40, and Luciana, 35, wed in 2005 and have two children – Isabella, 4, and Gia, 2. Luciana also has a daughter, Alexia, from a previous marriage.

Congratulations to both on the new addition to the family!