Star Wars fans are remembering Leia Organa star Carrie Fisher on what would have been her 63rd birthday. While on a flight from London to Los Angeles, Fisher suffered a heart attack and was hospitalized for four days before passing away on December 27, 2016, at the age of 60. The Los Angeles County Coroner later determined Fisher died from sleep apnea “and a combination of other factors,” leaving the exact cause of death “undetermined.” Fisher returned to the Star Wars franchise alongside original trilogy co-stars Harrison Ford and Mark Hamill when new franchise owners Disney revived the saga with J.J. Abrams’ Star Wars: The Force Awakens in 2015. Its sequel, The Last Jedi, featuring Fisher’s final performance as Leia, would be released posthumously in 2017.