At 72, Big B is sweating it out at the gym!

At 72, Big B is sweating it out at the gym!

Megastar Amitabh Bachchan, known for going the extra mile to prepare for his characters, is sweating it out nowadays for an upcoming film.

Bachchan, 72, said he needs to get in shape for the project, whose details have been kept under wraps.

Amitabh Bachchan. Pic/Bipin Kokate

"The work out goes well. The difference shall hopefully be of noticed by another 3 months. That is one helluva' long time to wait for body development. Many seek reason or query me about this sudden gym routine and why it should be written about today ... well... all these days!"

"The reason is not as complicated as many would have me imagine. They imagine that something is wrong and is now under medical treatment. Nothing medical at all. Its just that I wish to have some semblance of a refined body and one that shall be of some assistance to me during one of my future film projects," Bachchan wrote on his blog.