Aamir who plays a student in the movie has shed around 8 kgs to look lean and young. He said it it was very challenging to put on weight for a movie and shed it for the next. Interestingly Aami's character in the movie draws inspiration from the real life of Ghajini director A R Murugadoss. Aamir added that being an actor, his body was his instrument and he had to change his appearance for new roles. No wonder he is called the perfectionist actor in B Town.