Actress Carrie Fisher suffered a major cardiac episode while on a flight from London to Los Angeles on Friday, and has been rushed to the hospital, according to multiple reports.

The incident was first reported by TMZ – which described Fisher as having a “massive heart attack” – and confirmed by multiple outlets, including NBC News and the Los Angeles Times.

Representatives for Fisher did not immediately return the Post’s inquires.

United Airlines released a statement, without naming Fisher, about United flight 935 from London to Los Angeles. Medical personnel met the flight “upon arrival today after the crew reported that a passenger was unresponsive,” the statement reads. “Our thoughts are with our customer at this time.”

Fisher had been aboard a flight from London to Los Angeles when she suffered a “cardiac episode” that left her in critical condition, emergency officials told the L.A. Times.

Two law enforcement sources described her condition as “not good” to NBC News, which reported that the actress was rushed to a local hospital.

A number of people tweeted that they had been on the United flight with Fisher, including one who wrote that Fisher was taken off of the plane by EMTs.

The actress rose to stardom as Princess Leia in the Star Wars franchise, and has recently been on tour to promote her new memoir, The Princess Diarist.