Amitabh tired on set of 'Teen Pati'

Amitabh Bachchan has revealed his fatigue on the set of forthcoming film Teen Pati.

The actor-turned-producer wrote on his blog that some days he is required on set at 7am.

Big B said: "A tired brain can put one in the most trying circumstances."

Teen Pati, the name given to a gambling card which originated in India, is inspired by the Kevin Spacey film 21, which featured the Las Vegas exploits of five students and their tutor.

The movie will feature English actor Sir Ben Kingsley in a cameo role - a decision which surprised some critics.

The Ghandi actor will be on set for five days to shoot his scenes and Bachchan has posted pictures from his mobile of the pair on set on his blog.

Talking about his fatigue, Bachchan wrote on April 23: "There is so much to say and so little energy left in this Teen Pattied body of mine that I am again wanting to find my way to the pillow."