Natalie Portman won best actress for her role in ballet drama Black Swan, although she could not attend because she is heavily pregnant, and David Fincher won best director for The Social Network.

Last year's Best Actor winner Jeff Bridges presented the award for Best Actress to Natalie Portman for her role in the dark thriller Black Swan.

Natalie Portman, who won a best-actress Oscar this year for playing a demented ballerinain Black Swan, has given birth to her first child, a boy, reports People magazine.