Reports suggesting Lucia, who was due in December (09), had arrived on Friday (30Oct09) surfaced over the weekend (begs31Oct09) .
Gibson's spokesperson Alan Nierob says, "Oksana Grigorieva and Mel Gibson welcomed the arrival of a baby girl named Lucia on Friday at an undisclosed hospital in Los Angeles."
Lucia is Gibson's eight child - he has six sons and a daughter with ex-wife Robyn,
Grigorieva, 39, also has a son, Alexander, with her former boyfriend, actor Timothy Dalton.