Actress Angelina Jolie is adopting a newborn Ethiopian girl orphaned by AIDS, People magazine reported on Tuesday.

Jolie, who has toured the world as goodwill ambassador for the United Nations' High Commissioner on Refugees, said the baby would be named Zahara Marley Jolie but would not reveal the child's age, height or weight, People said.

The magazine had no further information on the baby's health but said she had been left an orphan by AIDS.

Jolie, 30, told People that she and her son Maddox, 3, who she adopted from a Cambodian orphanage, were "very happy to have a new addition to our family."

Arrangements for the adoption were expected to be completed Wednesday.

"Angie's over the moon," a source close to the actress told People. "It's a dream come true. She's always wanted to extend her family."

Jolie has been romantically linked with Brad Pitt, her Mr & Mrs Smith co-star, but the source denied they were planning a family.

"Angelina's adopting as a single mother and she wants that emphasised," the source told People.

The twice-divorced Jolie has often talked of adopting a second child. After a trip to Ethiopia earlier this year, Jolie said of Maddox: "My son is in love with Africa, so he has been asking for an African brother or sister."