Reports suggested that the 28-year-old "Queen" actress would share screen with Ranbir Kapoor and Deepika Padukone in the movie, which will touch upon every aspect of Dutt's life - from the age of 17 till present.
But Kangana says she is presently busy with filmmaker Vishal Bhardwaj's "Rangoon" and not doing Hirani's movie.
"I don't want to be disrespectful to Raju sir, but the truth is I have not been been approached for this film. I am busy on 'Rangoon' at the moment," Kangana said in a statement.