First on TVNewser: Good Morning America co-anchor Diane Sawyer is in Iran, several sources tell TVNewser.

She is expected to interview Iranian president Mahmoud Ahmadinejad and appear on GMA from Tehran on Monday. One of the sources says it'll be a live interview.

"This follows her interview last week with Syria's president," another tipster adds...

> Update: 10pm: "Sawyer will be on GMA Sunday too, from Tehran, advancing her Monday interview. She'll give some details as to how the interview came to pass," a tipster says...