Singer-actress Rita Ora, who stars in the film adaptation of author E.L. James' novel `Fifty Shades of Grey', says she's the `biggest fan` of all three books.

The 24-year-old, who essays the role of Mia Grey in the film, says she has all three books of James' novels including the follow-ups -- "Fifty Shades Darker" and "Fifty Shades Freed", reports femalefirst.co.uk.

`I have all three books, I'm one of their biggest fans. In the first book, my character really isn't in it that much,` Ora told Capital FM.

`I always have been asked, 'can you do a mini cameo?' It's never been like a supporting role. And I thought why not be a part of the biggest thing that's about to come out in 2015, regardless if it's 10 seconds or 90 seconds,` she added.

Although, Ora only has three lines in the movie, she believes that appearing in such a high-profile film will create more acting opportunities for her in the future.

Asked to recreate her American accent in the film, she said: `No! I'm actually speaking French in that movie! Honestly, I don't want you guys to over-talk about it, because it's just a little second, alright? It gave me a lot of opportunities for other Hollywood things.`