UPDATE 7:08 PM ET 12/23/16: Carrie Fisher is currently in stable condition according to her brother, as reported by the Associated Press.
Todd Fisher told the AP that his sister is "out of emergency" and stable at a Los Angeles hospital, but did not disclose any further information on her medical emergency, which happened Friday on a flight from London to Los Angeles and was reported by TMZ as a "massive heart attack."
Original story: Carrie Fisher, world-famous for her iconic role as Princess Leia in the Star Wars film franchise, is in critical condition following a "cardiac episode," according to multiple sources including the LA Times.
Fisher, 60, was on a flight Friday from London to Los Angeles, and was said to be "in a lot of distress on the flight," according to the LA Times report. She was rushed to a hospital after her plane landed at LAX.
Further details are scarce at this point. TMZ was the first to report on the incident, stating that Fisher had a "massive heart attack" on the plane, and was given CPR on board.
CBR will update this story with more details as they become available.