New Delhi, Aug 07 (ANI): Recently a picture of Ranbir Kapoor was doing rounds which left everyone guessing if it was the look of a younger Sanjay Dutt from Rajkumar Hirani's Sanjay Dutt biopic. But now, Ranbir Kapoor's trainer Kunal Gir has clarified that he was getting Ranbir to muscle up for the superhero film 'Dragon' co-starring Alia Bhatt and the leaked picture was not for Sanju Baba's biopic. Kunal said, "...the transformation has been done for a look test for Ayan Mukherji's film 'Dragon'." The man has been training Ranbir since July and posting pictures of their workouts on his Instagram account. Not only that Kunal was also seen on the sets of the Dutt biopic while Ranbir shot for some sequences in which he is seen working out in the gym.