Gibson announced he was expecting his eighth child with the Russian singer earlier this year (09), just weeks after his then-wife Robyn filed for divorce.

The couple welcomed baby girl Lucia on Friday (30Oct09), and Grigorieva's mum Lyudmilla Chernukha is relieved her daughter made it through her pregnancy without any medical problems.

But Chernukha admits her daughter had a lot to deal with during her pregnancy - and she could have suffered complications because of all the stress caused by the bad press.

She tells People.com, "I'm delighted! I'm very pleased for her because during her pregnancy she worried a lot because of all the bad press written about her. Lots and lots of lies.

"Her pregnancy was a hard one even though she had no (medical) problems with it. And, of course, Mel supported her and so did all her friends."

Grigorieva, 39, also has a son, Alexander, with her former boyfriend, actor Timothy Dalton, while Gibson has six sons and a daughter with his ex-wife.