Bollywood superstar Aamir Khan says he was offered to play the role of late Sunil Dutt in Rajkumar Hirani's "Sanju" , the upcoming biopic on actor Sanjay Dutt , but he refused it only because he wanted to essay the title character. Aamir interacted with the media on Wednesday. Aamir , who has clocked 30 years in the film industry , finds Ranbir a good actor and he is confident he must have done well in the film.