The erotic romance franchise features the actress as a college graduate who begins a sadomasochistic relationship with a young business magnate Christian Grey.

The 26-year-old actress who stripped off for a number of raunchy scenes in the first film and its sequels, described filming the scenes as uncomfortable and tedious.

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She revealed this in an interview with Interview Magazine.

"I'm filming the next two installments of the Fifty Shades movies back-to-back. I'm doing [a sex scene] today," she said.

"It's not … comfortable. It's pretty tedious. We're not having actual sex. But I've been simulating sex for seven hours straight right now, and I'm over it."

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Filming of the upcoming "Fifty Shades of Grey" sequels - and "Fifty Shades Freed" has commenced, and will shoot back-to-back.

The sequels which will have Jamie Dornan and Dakota Johnson return as Christian Grey and Anastasia Steele, are based on the worldwide bestselling “Fifty Shades” by E.L James.

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Recent addition to cast of movie includes undefined Eric Johnson as Jack Hyde among others.

The first film which was scripted by Kelly Marcel, was directed by Sam Taylor-Johnson, and undefined

"Fifty Shades Darker"  has been set for a February 10, 2017 release, while "Fifty Shades Freed" debuts February 9, 2018.

Watch a "Fifty Shades Darker" teaser below.