At the film's trailer launch here on Wednesday, Hirani told the media: "To showcase a biopic like this, you have to compress few parts into one. Similarly, Anushka Sharma's character is derived from myself and Abhijat. She is playing a biographer from London, and she comes to India. Sanjay wants her to write a book on him whereas she doesn't want to.
"We were also skeptical at first whether we should do this character or not. So basically she is us, but not as a filmmaker... (as) a biographer."
ALSO - Watch: Ranbir’s emotional reaction on Dad Rishi’s praises he showered on son after watching 'Sanju' trailer
The actress sports a messy, curly hair avatar in the movie, which talks about the ups and downs in the life of actor Sanjay Dutt. Ranbir Kapoor plays the central character in the film, which will release on June 29.