For Rajkumar Hirani's film "Sanju", Ranbir Kapoor has tried to change himself completely from the gesture, from the style of walking, rising and sitting, to the style of his hair. In 1981, when Dutt was making his Bollywood debut with Rocky, it was the legendary hairstylist Hakim Kairanvi who styled his hair & now the same man truned Ranbir Kapoor into Sanjay Dutt.