[UPDATE: Carrie Fisher has sadly passed away at age 60.]

Actress Carrie Fisher, known to most people as the iconic Princess Leia in Star Wars, has reportedly suffered a heart attack on a plane.

Early reports from TMZ say the actress was on a flight to Los Angeles from London where she was promoting her recent book and filming the U.K. sitcom Catastrophe. An eyewitness tweeted about the incident, claiming that Fisher stopped breathing and that medics on board were administering CPR until the flight landed. It is reported that the actress was immediately taken to hospital by paramedics for further treatment.

Fisher has recently published her autobiography, Princess Diarist, and has been promoting it ahead of the holidays. According to a source, the actress was distressed on the flight. Police confirmed that paramedics attended to an emergency on the plane, and the actress is now understood to be at UCLA Medical Center on a ventilator, after paramedics worked on Fisher for 15 minutes before they were able to find a pulse. A spokesperson for United Airlines released the following statement to THR:

“Medical personnel met United flight 935 from London to Los Angeles upon arrival today after the crew reported that a passenger was unresponsive. Our thoughts are with our customer at this time and any requests for additional information should be directed to local authorities.”

UpdateThe Associated Press is reporting the actress’ brother, Todd Fisher, said she is “out of emergency” and is in stable condition at the Los Angeles hospital. He did not disclose further details about the incident or her situation. In a phone interview with Variety, Todd Fisher revealed she is in the intensive care unit. He said, “She’s in the ICU and everybody’s praying for her. There’s nothing new from the doctors. There’s nothing new at all. … There’s no good news or bad news.”

Update #2: Carrie Fisher’s mother, Debbie Reynolds, has taken to Twitter to thank well-wishers and share the news that Fisher is currently in a stable condition.

Fans of the actress, as well as many of her co-workers and friends, quickly took to social media to wish her well.

As well as her role in Star Wars, Fisher has appeared in Blues Brothers, When Harry Met Sally, and Shampoo, among others. She reprised her role of Leia in the Star Wars franchise for Episode VII: The Force Awakens, and has recently been working on Star Wars Episode VIII

Source: TMZ, TwitterTHRThe Associated PressVariety