Rita Ora has undergone a major hair and beauty transformation for her role as Mia Grey in the upcoming Fifty Shades of Grey film.

The singer is no stranger to experimenting with her hair colour and style; practically every day we clock Rita with a new rainbow 'do of various length.

But we've never seen her sporting a super-short, 1920s-esque brunette bob with a fringe as she is in the newly-released stills from Fifty Shades.

Wearing a floral shift dress, this is definitely a more demure look for Rita, who tends to favour skin-baring outfits in her day-to-day life. But, although this is Fifty Shades, Rita's cameo as Christian Grey's sister is not 'the most sexual in the movie', as she told Fuse magazine earlier this year.

Although Rita only has a small part in the movie, she's still very much committed to the project.

It's going to be awesome. Everyone is going to have their own opinions. But for me this was such a great cameo to be involved in, and even though I'm only in it for a little bit, it's opened the door to a lot of movie things that I haven't actually announced yet, the 24-year-old told OK! Magazine.

We definitely can't wait to see Rita show off her acting chops…

By Olivia Marks