Rita Ora will star in Fifty Shades of Grey

Rita Ora/Twitter

“It’s official!” she tweeted. “I’ve been cast in @FiftyShades of Grey as Christian’s sister Mia. #FiftyShades”

The movie, which will be released on February 13, 2015, will also star Dakota Johnson, Jamie Dornan, Jennifer Ehle, Eloise Mumfors, Luke Grimes, Max Martini and Victor Rasuk.

Marcia Gay Harden will be Christian Grey’s adoptive mother, Variety reports.

Ora has had appearances in films such as Fast & Furious 6 and Spivs.