The star recently came across diaries she kept while shooting the 1977 movie, and she's planning to turn them into a new book about her time on the set.

"(I was) 19 years old (when I was filming)," she tells Live! with Kelly and Michael. "It was very calming for me... I confided with my hand to paper."

Carrie is reprising her role as Princess Leia in the hotly anticipated Star Wars: Episode VII - The Force Awakens, but she admits her return to the franchise hasn't been without controversy.

She recently told Good Housekeeping magazine that before she could step into the intergalactic royal's shoes again she had to lose 35lbs (15.9 kilograms).

"They don't want to hire all of me - only about three-quarters," she said. "Nothing changes, it's an appearance-driven thing. I'm in a business where the only thing that matters is weight and appearance. That is so messed up. They might as well say, 'Get younger', because that's how easy it is."