Vidya Balan reportedly went unnoticed when director Sujoy Ghosh made the actress walk on the streets of Kolkata in a pregnant get-up before beginning the shoot for his upcoming film 'Kahaani'.
According to the grapevine, the 34-year-old actress mingled with the crowd so much that a co-passenger even got up to offer his seat to her in a tram.
In the movie, Balan plays a pregnant woman in search of her husband and the father of the child.
It is scheduled to release on March 9.
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