Mary Kom under wraps

We all know how particular Sanjay Leela Bhansali is when he is shooting his films. The director doesn't like any picture, any plot of the film to be disclosed at the shooting stage.
However, with his next venture as a producer, the biopic on Mary Kom, Mr. Bhansali is taking more cautious steps. The producer has made his entire cast sign an NDA clause apart from mandatory ban on cell phones. Like we all know many pictures had been leaked during the Ram Leela shoot and so Mr. Bhansali is being careful about this time.