Zoya Akhtar has holed herself up inside her office to concentrate on the script of her film

Remember how a couple of years back, Karan Johar left for New York to concentrate on finishing the script of one of his films.

Same way before the making of Don 2, even Farhan Akhtar had checked into a city hotel to do nothing but to concentrate on the film's script and dialogues. And now we hear that Farhan's sister Zoya too has taken a similar step and locked herself up in her office to work on her upcoming film's script.

A source says, `Zoya has given clear instructions that no one should disturb her while she is in her office... not even phone calls.`

Her cell phone and landline also have been switched off. The office staff makes sure she gets her daily meal at designated hours only. `Zoya wants to complete her script before the promotion of Bombay Talkies goes underway and she gets distracted,` adds the source.