Natalie Portman Welcomes Baby Boy
Further details, including the name of the baby and when it was born, were not released.
Portman announced she was pregnant in December. She's currently engaged to the baby's father, choreographer Benjamin Millepied, whom she met while working on 'Black Swan.'
Portman won an Oscar for the Darren Aronofsky thriller in February. She recently celebrated her 30th birthday, on June 9.