3 idiots: Aamir was 44 when he did 3 Idiots. In the film, he was playing the role of a 25-year-old engineering student. To look exact like a 25-year-old man, Aamir lost tremendous weight. The handsome actor looked quite young in the film. It seemed that he was ageing backwards. Well, if you watch the film, we bet you’d not recognize what must be his real age.