Damon's spokeswoman Jennifer Allen says Luciana Damon gave birth to Stella Zavala Damon on Wednesday in New York City.
She is the couple's third daughter. She joins Gia, born in 2008, and Isabella, born in 2006. Luciana Damon also has a daughter, Alexa, from a previous marriage.
Damon met his wife in 2003 while she was working as a bartender in Florida and he was filming "Stuck on You." They married in December 2005 in New York.