Oprah Winfrey hopes 'Fifty Shades of Grey' will be sexy.

The talk show host wants the movie adaptation - starring her pal Rita Ora - to be ''filthier'' than E.L. James' erotic novel and she hopes there will be large amount of explicit action shown on screen.

She told The Sun newspaper: ''I know Rita and I know 'Fifty Shades Of Grey' - and I just can't wait for the movie.

''I've read the book and I just hope the movie is filthier than the book. Less talking, more action!''

Meanwhile, Dakota Johnson previously admitted the film is set to be so raunchy that she hasn't discussed the intricacies of her role as Anastasia Steele - who gets entangled in an S&M relationship with kinky businessman Christian Grey (Jamie Dornan) - with her family.

Dakota - who will have to strip off naked for the part and engaged in very explicit scenes - blushed: ''I think that I would love to have [my parents] experience it with me, but I can't really do that, just because of what it entails. I talk to them more about problems with my landlords. That's my talking point with my family.''

The book trilogy has been dubbed ''mummy porn'' by the media due to its popularity with middle-aged women.