Jolie said prior to Saturday's release of "The Changeling" that her twins, Vivienne and Knox, were perfectly healthy following their birth in July, People magazine reported.

"Everybody's great," said Jolie, who is in a relationships with actor Brad Pitt and has four other children. "The babies are getting big and healthy and developing personalities."

The 33-year-old actress did confess to being a "little bit" sleep-deprived since the twins' arrival, but said she and Pitt have managed to find some time for themselves.

"We have some help a couple of nights a week, so on those nights we catch up on our sleep," she told People.

"Changeling" tells the story of a mother, played by Jolie, whose child is kidnapped.