Producers Bunty Walia and Jaspreet Singh Walia are leaving no stones unturned for their forthcoming pet project, "Ek Ajnabee".

They have now roped in music director duo Vishal-Shekhar as guest composers for their high-profile film "Ek Ajnabee" starring Amitabh Bachchan in the lead.

The producers have already assembled actors like Abhishek Bachchan, Lara Dutta, Pooja Bedi and now Sanjay Dutt to do guest appearances in the film. Now they have rounded it off by pulling in Vishal-Shekhar who will be composing an item song for the film.

"Ek Ajnabee" is about a man (Amitabh Bachchan) who had lost all interest in life until he meets an eight-year-old girl, to protect whom he is hired. Over the course, there are changes in the man as the little girl fills his life until the time when the girl is kidnapped by some thugs.

The film, directed by Apoorva Lakhia, is slated for a December release.