Carrie Fisher revealed in her new book "The Princess Diarist" that she and co-star Harrison Ford had an affair while filming the original "Star Wars" film in 1976.

Just 19 at the time, Fisher describes her relationship with Ford, who was married with kids and 33 years old, "as intense," estimating the affair lasted about three months.

"It was Han and Leia during the week, and Carrie and Harrison during the weekend," Fisher told People magazine in an exclusive interview.

Forty years later, Fisher, 60, wanted to write a book about her formative years. She apparently couldn't tell that story without detailing her experience with Ford.