For Aamir Khan, a Muslim, RDB was his first film where he was playing a North Indian Punjabi character. Aamir worked really hard in working towards the right dialect and diction and his physique complimented the cool 'just out of college' guy look aptly.
6. Ghajini
For Ghajini, Aamir khan devoted 9 months of time in the process of building his physique, losing weight and looking muscular. Aamir Khan's transformation in the film did manage to stun us all.