Bollywood actress Vidya Balan, who is playing Amitabh Bachchan's mother in her forthcoming movie "Paa", says that now she can proudly tell everyone that the 67-year-old megastar was her first child.

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"After this role, I can proudly tell my children and grandchildren that Big B was my first child. Not even in my wildest dreams had I thought of playing mother to the living legend of the industry," said Vidya Balan.

"It was an humbling experience to work with Bachchanji. This is a very special movie for me," she added.