Voice actor Angelina Jolie poses during a photocall for the animated film "Kung Fu Panda" by directors Mark Osborne and John Stevenson at the 61st Cannes Film Festival May 15, 2008. [Agencies]

"Entertainment Tonight" aired a story about the birth of Angelina Jolie's twins despite being repeatedly told beforehand that the report was based on information from someone impersonating Jolie's assistant, according to documents and two people with knowledge of the exchange.

The celebrity newsmagazine denied Wednesday that it knew about an impostor before the broadcast. The identity of the impostor remained unknown.

On Friday morning, the show posted a story on its Web site and sent an e-mail alert to media outlets saying it had confirmed the birth of Jolie's twins. The Associated Press picked up the report.

"Entertainment Tonight" did not name its source at the time. It later revealed that the report was based on e-mails from someone it thought was Jolie assistant Holly Goline.

Shortly after the story was posted but several hours before the broadcast aired, Goline told "Entertainment Tonight" that she was not the person with whom they had been corresponding, a person with direct knowledge of the conversation told The Associated Press. That account was confirmed by another person close to Jolie.