Nicole Kidman is reportedly set to adopt a Vietnamese baby.

The Oscar-winning actress and her husband Keith Urban are said to be keen to give their 10-month-old daughter Sunday Rose a sibling and have already approached authorities to start the process.

Dang Minh Dao, deputy of the Department of International Adoption at the Ministry of Justice in Hanoi, told Australia's New Idea magazine: "Yes, Nicole Kidman wants a baby from Vietnam. We've been approached."

However, he refused to reveal whether the couple would prefer a boy or a girl, saying: "This is very sensitive information. We are keeping it closed."

The US government refuses to deal with adoptions from Vietnam over fears of baby trafficking and corruption.

Although the couple live in the US they are both Australian citizens and are reportedly using their nationality to help them.

Trinh Thi Tre at the Australian Consulate-General in Ho Chi Minh City said: "It's still possible to adopt from Australia."

Keith has had a high-profile battle with alcohol addiction in the past, but Mary Ann Russell at the US Consulate-General in Ho Chi Minh City insists that won't be a problem.

She said: "They would just need to prove they are a reformed character the end of the day, the main factor is the money. That's what really matters."

It can cost more than £15,000 to adopt a child through an agency in Vietnam.

Nicole - who is also rumoured to be pregnant - already has two adopted children, Isabella and Connor, with ex-husband Tom Cruise.

(China Daily/Agencies June 3, 2009)