Adam Driver went from quirky Girls actor to Hollywood superstar practically overnight in late 2015 when he played Kylo Ren, the villain at the heart of Star Wars: The Force Awakens. While we imagine being on the set of any Star Wars film would be an incredible experience, Adam had the special pleasure of working with the late Carrie Fisher, who returned to reprise her iconic role as Princess Leia. Adam opened up about the tremendous loss of Carrie while appearing on The Late Show With Stephen Colbert on Thursday night. "As you can tell from meeting her, she burned very bright, and had such a great, very generous energy," he said. "For that suddenly not to be on set, and we're talking about it and all publicity, or just in life when you see her at a Star Wars event . . . to have her character — not just her character in the movie, but her character missing from that very small unit — is a tragedy." Watch him talk more about her at the 6:36 mark.