Rita Ora has revealed that she couldn't remember her lines whilst filming the 50 Shades of Grey movie.

The singer has a part in the flick version of the E. L. James erotic novel, which will be released on February 14 next year.

However, the 'Hot Right Now' star told Access Hollywood that she needed to be reminded of her lines on set because she was too nervous.

Ora said: "I had to have someone in my ear on set telling me what to say before I said it because I was honestly like so nervous I forgot everything that I had learnt."

The Brit added that actress Dakota Johnson, who plays the role of Anastasia Steele, helped her during filming.

She said: "She's a great friend of mine and she really eased me, and she was really nice to take care of me."

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Watch the trailer for 50 Shades of Grey below: