Matt Damon, Luciana Barroso

Matt Damon has that girl group he's always wanted.

The 37-year-old actor welcomed his second daughter with wife Luciana today, Damon's publicist confirms to E! News.

"Matt and Lucy Damon had a baby girl named Gia Zavala on Wednesday, Aug. 20th. Everyone's doing great," rep Jennifer Allen said.

The new addition joins sister Isabella, 2, and half-sister Alexia, 10, Luciana's daughter from a previous relationship, in the Bourne Ultimatum star's ultra-feminine household.

"I'm so outnumbered down here, it's crazy," Damon joked to USA Today recently.

People's reigning Sexiest Man Alive—who had to relinquish his crown for a bit while filming Steven Soderbergh's The Informant—swapped vows with his Argentinian-born missus in December 2005.