The `Fatal Attraction` star has reportedly agreed to portray the Scottish singing sensation in a biopic charting her incredible to rise to worldwide fame, starting from her appearance on Simon Cowell`s TV show `Britain`s Got Talent` to being interviewed by Oprah Winfrey and singing for the Pope. A source told The Sun newspaper: "The film is full steam ahead now the leading role is sorted. It was always going to be a tricky one to cast. Susan`s incredible story is so well-known across the planet that the film is bound to go down a storm. "Glenn has played some imposing women in the past including Alex Forrest, who boils the pet rabbit in `Fatal Attraction`. But this might just be her biggest role yet." Discussions for the film had been ongoing for some time, and although Susan, 49, wanted little known TV actress Elaine C Smith - who is also from Scotland - to play her on the big screen, bosses wanted a major Hollywood name for the role and decided on Glenn, 63, early on. Shooting on the movie is rumoured to be going to start this year.