Meeting Angelina Jolie and Brad Pitt would be nerve-wracking enough, but for the doctor who was in charge of delivering the superstar couple’s new babies, the pressure grew immensely.

The Wanted actress gave birth to son Knox Leon and daughter Vivienne Marcheline by Caesarian section at the Fondation Lenval hospital in France on Saturday.

And Jolie's obstetrician, Dr Michael Sussmann, confessed that he was a little worried before the operation.

He says: "It's true that there was pressure due to the couple's fame."

The pair, who have three adopted children and a biological daughter already, were described as "an exemplary father and mother" by the doctor.

Sussmann adds: "She (Jolie) is a patient who was totally obedient, very calm, very kind."