Ranbir Kapoor, who will be seen as Sanjay Dutt in the Rajkumar Hirani directed biopic Sanju, worked hard to resemble Sanjay Dutt. Ranbir will be seen in three different looks- beefy body, a lean look from 90's and the third look will showcase his phase in drug rehab. He has gained more than 13 kgs of weight. Know about Ranbir's diet plan for film Sanju.