Cate Blanchett welcomes third son

Cate Blanchett has given birth to her third son.

Ignatius Martin, Blanchett's fifth child with her writer-director husband Andrew Upton, was born Sunday at a Sydney hospital. He weighed 3.6 kilograms.

In November, when she confirmed her pregnancy, Blanchett, 38, was informed of rumors that she was expecting a boy, prompting her to respond: "You know more than me. It's early days yet. It's due in April!"

The couple, who are based in Australia, already have two sons: Dashiell John, 5, and Roman Robert, 3.

The family have already received congratulations from the Australian Prime Minister, Kevin Rudd -- who congratulated the actress on her baby's safe arrival. "I want to extend my best wishes to Ms Blanchett and her family and thank her for her contribution to the Australia 2020 Summit thus far," he said in a statement.

"Ms Blanchett has indicated that she will continue to participate in the 2020 summit in her role as a co-chair of the creative Australia panel and has asked that Dr Schultz also be added as an additional co-chair on this panel."