Just a couple of days ago we informed you that how Deepika Padukone is addressing Amitabh Bachchan as 'Baba', while shooting for 'Piku'.

And thus the actor decided to respond to Deepika's sweet gesture recently. Big B has also coined a pet name for Deepika. A source says, "He calls her Deepiku, nobody else addresses her by that name."

Juhi Chaturvedi, the writer of the movie says that the two share an amazing camaraderie on as well as off screen.

She says, "The way they address each other, on and off the sets, shows the comfortable relationship they share."

Shoojit Sircar's 'Piku' which is being shot in Kolkata, will see both the actors playing Bengali characters.