The “Fifty Shades of Grey” trailer only increased fans' appetites for the movie adaptation of the erotic novel by E.L. James. Rita Ora, who plays Christian Grey’s sister Mia in the film, sat down with Access Hollywood to share some details about the highly-anticipated flick.

It wasn’t easy for Ora, 23, to land the role. She told AH she received eight callbacks, something that shocked the British songbird. “I was a bit stressed out during the audition process,” she said. “But when I got that phone call I was so happy. I couldn’t wait to tell everybody.”

Before “Fifty Shades, Ora had little acting experience, except for a brief appearance in “Fast & Furious 6” so doing an American accent for the film intimidated the “I Will Never Let You Down” singer. She said it was “incredibly difficult” and said she had to wear an earpiece while she was on set because she was “so nervous” and would forget everything she learned.

But overall, Ora explained she is thrilled to be a part of the “Fifty Shades” team and even found a friend in lead actress Dakota Johnson, who plays Christian Grey’s love interest Anastasia Steele.

“She’s a great friend of mine,” the singer said about Johnson. “She really eased me [on set].”

After the trailer’s premiere, where fans finally got to see the chemistry between the film’s two lead stars, some have wondered how close the movie adaptation will be to the best-selling erotic novel. Ora, who is a fan of the trilogy and apparently read all three of the books, said “the movie is as close as it can visually be.” She added: “I think the actors are phenomenal in it.”

“Fifty Shades of Grey” is set to premiere in theaters Feb. 13. Blink and you’ll miss Ora in the trailer, but it is posted below to watch (or re-watch) her as Mia:

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