TMZ is reporting that actress Carrie Fisher suffered a massive heart attack today on an airplane.

She was on a flight from London to LAX when she went into cardiac arrest. Reports are that the plane was 15 minutes from landing when it happened. People on board administered her CPR.

The plane landed just after noon in Los Angeles and she was immediately rushed to a nearby hospital.

Fisher, who became famous for playing Princess Leia in the "Star Wars" movies, has been out on a book tour.

This is obviously a developing story and we send our prayers to her and her family.

UPDATE: Her brother, Todd Fisher, told the Associated Press that she was "out of emergency" and now stabilized at a Los Angeles hospital. He said he could not discuss any further details about what happened.