Miuccia Prada was ''really fascinated'' so many of her Prada dresses were easily adapted for 'The Great Gatsby'.

The Italian fashion designer transformed 40 garments from the Prada and Miu Miu archives for the forthcoming romantic drama movie - which is set in New York in the 1920s - and she was shocked how little she had to adapt some of the items of clothing for the movie.

She told WWD: ''That's what was interesting. The point of view can transform things so much. Yes, probably a few [dresses] had that kind of edge, but almost none were meant to be 20s when I did them. I was really fascinated by that.

''The reality is that from 1920, I could find a photo or a fashion illustration that would support almost any choice that we've made in the film.

''But we are not making a documentary. We are trying to express a story in a way in which Fitzgerald's visceral modernity is able to transgress the plane of the screen.''

The 63-year-old designer admits she did not focus on ''glamour'' while designing the costumes, which included the stunning party dress worn by Daisy Buchanan - who is played by Carey Mulligan - in the Baz Luhrmann-directed project.

She added: ''When I read [the book], it was psychological. It was not about glamour for me. It was a real [study of] personality, very internalised.

''It was meant to be about light. It became about money, because Luhrmann wanted to show her as the most beautiful and rich woman on earth.''