Each time she signs a movie, the charming Vidya Balan has something new and surprising for us…. Yet again Vidya is going to play the motherly image (she played a mom in ‘Paa’) in Sujoy Ghosh's ‘Kahaani’. The film is about a woman who comes down from London in search of her husband.

In this Vidya is said to be featuring as a six-month pregnant woman. And folks, she is one real disciplinarian, we say…. For, Vidya took her character so seriously that she imposed a ‘No Smoking’ ban on the shooting sets. This ban in fact annoyed the unit members.

Said the director to sources, "She's really into the character. So much so that after a while she started freaking us out. She started behaving like an expectant mother and wouldn't let anyone smoke in front of her… And we were like… Huh? Pregnant!? Who? So I think for Balan once she is mentally there, physical bits are baaye haath ka khel."

Hmmmm, now that’s what we call the ‘Maa’ of Professionalism…..