Angelina Jolie says having six kids in the house is "chaos," but she says she and Brad Pitt are "managing it and having a wonderful time."

Jolie told People that she and Pitt were "in shock and couldn't stop laughing" when they learned they were having twins, which made their debut on newsstands Monday in People and Hello! magazines.

She said that her daughters Shiloh and Zahara are acting like "little mommies," picking out clothes for twins Knox and Vivienne, as well as helping to change and hold them.

People and Hello! reportedly shared the $14 million cost of the exclusive photos.

The twins were born July 12 in Nice, France.

In the People interview, Jolie nixed rumors in-vitro fertilization.

"If they had been conceived through IVF, we would have been happy to discuss it," Jolie told the magazine. "But we have been fortunate never to have had fertility problems."

Pitt said that their son Maddox is already asking his parents when they'll be having more babies.