Rita Ora promises that "Fifty Shade of Grey" is going to be passionate. The British singer was cast as Mia Grey, Christian Grey's adoptive sister.

"The movie is amazing, it's such a great passionate movie," she said during a radio interview. "I had to be involved, I love the books."

"I know everybody's going to watch it, whether it's in secret or confidence, but everyone's going to watch it," she added. "It's going to be fun. I look really different and it was a good experience."

In January the "Radioactive" singer told MTV that fans were going to be in for a "shock" when they finally saw the film.

"[It's] gonna be the biggest and most amazing shock ever," she said adding that she was "so excited" for fans to check it out.

She also dished on filming alongside Jamie Dornan (Christian Grey) and Dakota Johnson (Anastasia Steele).

"Oh, I was nervous because it was the first time I ever did a movie with words," she said. "But it was so nice. The director Sam [Taylor-Johnson], she was incredible, so it was all love."

Johnson also had some kind words to say about the production process during an interview with Vanity Fair.

"It's been a very smooth, fun and creative experience. I think going into something like this you kind of have all these different fears of what it could be like, and none of those things are happening," the 24-year-old actress said. "We all get along really well, the crew is amazing and we're just all trying to make this project the best that it can be."

Recently, producer Dana Brunetti revealed that production for the film was almost complete. A source told E! News that everything was ahead of schedule and the last scheduled day of filming was Feb. 23. Hopefully, the next thing released is a teaser trailer starring the kinky Christian and Ana.

"Fifty Shades of Grey" will be released Feb. 13, 2015.