Shoojit Sircar's 'Piku' managed to bring an interesting casting of sorts - including Amitabh Bachchan, Deepika Padukone and Irrfan Khan. While the film boasts to have a quirky storyline, nevertheless on sets too the cast developed a great bonding with each other.

It is no news any more that Big B and Deepika play father and daughter in the film. The two have became so close, that even on the sets the actress calls the megastar as Baba (father) and everyone, including Irrfan Khan, got used to address him the same on sets. And guess what? In turn Big B too has given Deepika a pet name, which no one on sets calls her. It is said that the veteran actor fondly calls her Deepiku. Oh So Cute.... Simply matching with the film's title, 'Piku'.

Well, this surely shows how comfortable the actors have got with each other...