The "Force is dark" with the Star Wars fandom right now. On Dec. 27, Carrie Fisher, who is best known for her portrayal of Princess Leia, passed away at the age of 60 after suffering a heart attack on Dec. 23. Since the news broke, stars from the franchise have been taking to social media to express their sadness and memories of the actress. Her onscreen brother, Mark Hamill, tweeted a black-and-white photo of the two, writing, "no words #Devastated," while Harrison Ford shared a statement following her death. Director J.J. Abrams and Star Wars: The Force Awakens's John Boyega and Lupita Nyong'o also expressed their condolences on social media. See their reactions ahead.