Rita Ora has teased her upcoming film Fifty Shades of Grey saying that fans should expect something that would make it worth their while going to see.

The How We Do hitmaker told MTV, "I've seen some, I've definitely seen my parts."

She added, "I'm literally sworn to secrecy, but what I can say is expect something that would really make it worth your while."

On working on the film Ora commented, "Doing the movie was probably one of the best things ever, being in Vancouver, getting out of music and just making it work really good. I did like eight auditions so I thought I would never get it. It was incredible that it worked out."

Ora plays Christian Grey's sister Mia in the adaptation of E.L. James' novel. The film stars Jamie Dornan and Dakota Johnson in the two lead roles and is set for release on Valentine's Day 2015.