Director Rajkumar Hirani has been working in his basement, day and night, rushing to finish the edit of his upcoming film PK`. So much so that he has been totally cut off with the outside world, minimized his interaction and barely steps out. However, the only person Raju has been in constant touch with is Sanjay Dutt.

Both the actor - director have worked with each other on two films (Munnabhai Series) and share a great bond. Our sources revealed that Raju Hirani has recently got emotionally charged with a letter he received from Sanju Baba. Both have been in constant communication through hand written letters. On a regular basis the actor has been writing letters to Raju from jail.

In fact, the actor has asked Raju about the first poster of PK` as the new inmates of Sanjay have been raving about it. It is so because Sanjay has been away from any news and communication from outside. He gets to read only old news papers in the jail. He has no idea on what the poster has been. He was very excited about the poster as he had got very good reviews from the inmates. Following which Sanjay wrote a long letter to Raju talking about the feedback he received in the jail on the poster and how excited he is when his poster will come out.

Also starring Aamir Khan, Anushka Sharma and Sushant Singh Rajput in lead, PK` is slated to hit the screens on 19th December 2014.