UPDATE 2: Carrie Fisher is in stable condition, her mother Debbie Reynolds wrote on Facebook. "If there is any change, the family will share the information at that time," she wrote. "To all her friends and fans, I thank you all for your prayers and good wishes."
UPDATE: Carrie Fisher's brother, Todd Fisher, told the Associated Press that she was "out of emergency" and stabilized at a Los Angeles hospital Friday afternoon, but that he could no discuss any further details.
Carrie Fisher, the actress best known for playing Princess Leia in the Star Wars movies, suffered a heart attack Friday on a plane flying between London and Los Angeles. Emergency officials confirmed the news to the Los Angeles Times. The Los Angeles Fire Department rushed the actress, who is 60, at about a quarter past noon, shortly after the plane landed.
United Airlines released a statement that did not identify Fisher but confirmed that its crew had reported that a passenger was unresponsive. "Our thoughts are with our customer at this time," it read. A pilot had also reported to air-traffic control that passengers who are nurses were taking care of the passenger.
Upon landing, emergency personnel performed CPR on Fisher, the Times reports an LAX Police Department representative as saying. A representative for Fisher did not return Rolling Stone's request for comment on the actress' condition.
Actor Mark Hamill, who plays Luke Skywalker in the Star Wars films, tweeted, "as if 2016 couldn't get any worse... sending all our love to Carrie Fisher." And Peter Mayhew, who plays Chewbacca, wrote, "Thoughts and prayers for our friend and everyone's favorite princess right now."
Fisher, who is the daughter of Debbie Reynolds and Eddie Fisher, rose to fame when her second movie – 1977's Star Wars – became a box-office hit. She subsequently appeared in that film's immediate sequels, as well as The Blues Brothers, Hannah and Her Sisters, The 'Burbs, When Harry Met Sally and Jay and Silent Bob Strike Back, among others. She reprised her role as Leia in 2015's Star Wars – Episode VII: The Force Awakens and is slated to appear in an eighth installment of the film series, which is slated to come out in December 2017.
She's also written several novels, including the book and subsequent movie Postcards From the Edge, which touched on her poor relationship with her mother. She's also written three nonfiction books, including Wishful Drinking – which she performed as a one-woman play – and this year's The Princess Diarist.