In Carrie Fisher's new memoir The Princess Diarist, she writes that she had an affair with Harrison Ford while they were filming Star Wars: Episode IV – A New Hope (1977). From CNN:
"It was so intense," Fisher told People magazine. "It was Han and Leia during the week, and Carrie and Harrison during the weekend…"
Fisher was 19 when she landed the breakthrough role of Princess Leia for the 1976 filming. Ford, then 33, was married to Mary Marquardt, with whom he had two children.
Fisher writes that she and Ford spent their first night together after a birthday party for director George Lucas.
"I looked over at Harrison. A hero's face — a few strands of hair fell over his noble, slightly furrowed brow," she wrote. "How could you ask such a shining specimen of a man to be satisfied with the likes of me?"
"I was so inexperienced, but I trusted something about him," she added. "He was kind."
The Princess Diarist by Carrie Fisher (Amazon)