Damon and Luciana are doing great and have named their newly born as Gia Zavala, confirmed their representative.
The beautiful tot was born on August 20.
The newborn joins sister Isabella, 2, and half-sister Alexia, 10, Luciana's daughter from a previous relationship to make the household ultra feminine.
'I'm so outnumbered down here, it's crazy,' E! Online quoted Damon, as saying.
Damon is a 'phenomenal' father, he absolutely adores those kids, he's doing it really well,' Damon's close pal actor George Clooney said.
Text: ANI | Photograph: Dave Hogan