Cate Blanchett has revealed she adopted her new baby girl from the US.

The actress and her husband Andrew Upton recently welcomed a baby girl, Edith, in to their family of three boys and Blanchett spoke briefly about her new daughter in Sydney on Sunday night.

The actress was quizzed about the adoption laws in Australia when she made the revelation.

“I think it is … well I haven’t been through it here. It was in the United States,” she told Fairfax Media. “There’s a lot of children out there that don’t have the good fortune of our biological children so it’s lovely to welcome a little girl. We’re besotted,” she said.

The actress was walking the blue carpet in Sydney to promote her latest film, Cinderella, in which she plays the wicked stepmother.