SYDNEY, Australia —  Cate Blanchett has given birth to her third son.

Blanchett, 38, delivered Ignatius Martin Upton in Sydney on Sunday, said Tim McKeough, media relations manager at the Sydney Theatre Company, where Blanchett and her playwright husband are co-artistic directors.

"All are well and very happy," McKeough said Monday.

The baby weighed 7 pounds, 9 ounces, he said.

Australian Prime Minister Kevin Rudd offered his congratulations in a statement Monday, and said Blanchett would still co-chair an arts panel at a national summit Saturday.

The Australia 2020 summit will gather 1,000 leading Australians to propose ideas for the future direction of the country, with panels including health, climate change, economy and the arts.

Blanchett and husband Andrew Upton have two other sons: Dashiell, 6, and Roman, 3.

The Academy Award-winning actress next appears with Harrison Ford in the movie "Indiana Jones and the Kingdom of the Crystal Skull," due in theaters in May.