Aamir is known for his hard work and dedication towards his work. He didn't leave a stone unturned to transform himself from a chocolate boy into a macho man with eight pack abs and pumped up muscles. Now once again he is experimenting with his body for Raj Kumar Hirani's 3 Idiots.

It is learnt that Aamir had to shed 7 to 8 kgs to look like a student. We were shocked to see the lean Aamir. No doubt he was looking much younger than his age.

When asked what was more difficult, to put on or lose muscles. "Both were difficult. I had to stretch myself to extreme limits when I was building my body. It was a testing period for me."

He informs that the decision to let go of the body that he made in the past one year was difficult one.

"But I am an actor and my body is my instrument. I have to change my appearance for my roles. Now I had to lose weight for 3 idiots. I am trying to become like my director Murugadoss. Actually my role in 3 idiots is modeled on my director Murugadoss." He quips.