The birth of twins Vivienne Marcheline and Knox Leon, born to Angelina Jolie and Brad Pitt on Saturday, was a moving and emotional experience for Pitt. The couple's doctor, Dr. Michel Sussmann, said that Pitt never left Jolie's side and even cut the babies' umbilical cords.

"He was ... perfectly calm, totally determined, very pleased to be at the birth of his children, very moved and very emotional," said Sussmann.

The doctor added that Jolie was calm during the delivery also. "It was an epidural, so [Angelina] was awake and speaking and laughing. They were happy."

Asked whether the birth had been a textbook delivery, Sussmann replied, "absolutely no problems."

When asked how long Jolie, Vivienne and Knox will remain in the hospital, the doctor said, "I don't know. She will stay for a few days. You know, in Europe it isn't like in the United States, where the patients go home after three days. They will stay a bit longer until everything is okay."

He added: "The babies are fine. The babies are with the mother and father and they are fine."