The actress starred as Princess Leia in Star Wars: Episode IV - A New Hope, while Harrison took on the role of Han Solo. While rumours of a romance between the pair have been circulating for years, Carrie has finally confirmed the claims in her new memoir The Princess Diarist.

According to Carrie, the pair embarked on a clandestine romance after attending a birthday party for Star Wars creator George Lucas. Despite Harrison being married to first wife Mary Marquardt at the time, Carrie claims their affair continued for three months.

"It was so intense," Carrie told People magazine of the love affair. "It was Han and Leia during the week, and Carrie and Harrison during the weekend... I was so inexperienced, but I trusted something about him. He was kind."

Carrie was 19 years old at the time, while Harrison was 33. Explaining her decision to come clean about the affair, the now 60-year-old star said she had been inspired to document the romance after coming across several of her journals from the time, in which she had written about her insecurity surrounding the affair.

One excerpt written after the pair's first night of passion reads: "I looked over at Harrison. A hero’s face… How could you ask such a shining specimen of a man to be satisfied with the likes of me?"

According to People, Carrie gave Harrison a heads up about what she was going to be writing about in the memoir and also sent him a draft. However, the actor didn't respond to the publication's request for comment on the affair allegations.

Harrison and Mary had two children together but filed for divorce in 1979. He was later married to Melissa Mathison between 1983 and 2004, before marrying current wife Calista Flockhart in 2010. Carrie has only been married once - to singer Paul Simon from 1983 to 1984.

Harrison and Carrie both reprised their roles for Star Wars: The Force Awakens last year (15).