One of the most anticipated films of 2015 is the big-screen adaptation of the erotic novel 'Fifty Shades of Grey,' but eager fans may be concerned to find out that the director, Sam Taylor-Johnson, and author E. L. James feuded on the movie's set.

Sam Tyalor-Johnson
Taylor-Johnson is the director of the 'Fifty Shades of Grey' adaptation

While being interviewed by Porter magazine, the British filmmaker spoke very honestly when recalling the tension between herself and James during their time working together, even calling the novelist "difficult."

More: Sam Taylor-Johnson Talks "Hardest Thing" About Directing 'Fifty Shades Of Grey': "I'm Literally Going Out Of My Mind"

"It was difficult, I'm not going to lie," Taylor-Johnsontold the magazine. "We definitely fought, but they were creative fights and we would resolve them. We would have proper on-set barneys, and I'm not confrontational, but it was about finding a way between the two of us, satisfying her vision of what she'd written as well as my need to visualize this person on screen, but, you know, we got there."

However, the 47-year-old director and James, 51, who is best-selling author with her first global hit, 'Fifty Shades of Grey,' did eventually find a way to work with each other. The adaptation, which sees Jamie Dornan portray Christian Grey and Dakota Johnson as Anastasia Steele, is due out next week.

More: 'Fifty Shades of Grey' Has 20 Minutes Of Sex Scenes (Film Runs 100 Mins)

"I knew how it should be made, needed to be made, and I felt a certain responsibility to make it the right way," Taylor-Johnson continued. "I felt it was an incredible story. It's like a dark twisted fairy tale, very romantic, and it was interesting how troubling it was, and how romance and the darkness interweaved."

'Fifty Shades of Grey' is expected to hit theatres on Feb 13th, 2015.