The "Fifty Shades of Grey" flick has added another sultry star it its cast: Rita Ora.

The 23-year-old British songstress will play the adopted sister of Christian Grey in the upcoming film adaptation of E.L. James' erotica novel.

"It's official!" Ora announced via Twitter. "I've been cast in @FiftyShades of Grey as Christian's sister Mia. #FiftyShades."

Irish hunk Jamie Dornan is playing S&M enthusiast Christian Grey, replacing actor Charlie Hunnam after Hunnam bowed out of the flick, while Dakota Johnson has nabbed the lead female role of Anastasia Steele.

Filming is underway, with the movie is slated for a Feb. 13, 2015 release.

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Questions over waterfront preservation program ... Fake vaccination crackdown ... What's next for Giants after Jaxson Dart injury ... Potential nor'easter could bring rain, wind, flooding

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