Actor Vicky Kaushal, who stunned the critics and audience with his power packed performance in “Masaan” and “Raman Raghav2.0”, is currently busy filming Rajkumar Hirani's biopic on Sanjay Dutt that casts Ranbir Kapoor as the protagonist. In the biopic, Vicky plays the role of one of Sanjay Dutt's closest friends. He, however, is not ready to reveal much details about his role.