Rita Ora is one of 'Fifty Shades of Grey's ''biggest fans''.

The 24-year-old singer stars in the film adaptation of author E.L. James' novel 'Fifty Shades of Grey', and has also revealed herself to be a fan of the follow-up books, 'Fifty Shades Darker' and 'Fifty Shades Freed'.

Rita - who appears in the racy movie as Mia Grey - shared: ''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.

''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 of if it's 10 seconds or 90 seconds!''

Rita only has three lines in the movie, but said 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 told Capital FM: ''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.''