Sanjay Leela Bhansali had written the script of 'Khamoshi' with Amitabh Bachchan in mind.

Titled ‘Aaya Re Aaya Bodyguard’, the track will feature the ‘Dabangg’ Khan and his ex-flame Katrina Kaif.
Choreographed by Ganesh Acharya, Salman’s presence in the song is mandatory as it portrays his character in the film.
Katrina to surpass ‘Sheila Ki Jawani’
Interestingly, if sources are to be believed, Kat is taking the song too seriously and is all geared up to outdo her raunchy performance in ‘Sheila Ki Jawani’.
Conversing about Salman’s dance steps in the item song, a little birdie said, “Salman likes to do his own thing in the dance numbers. Everyone knows in 'Munni badnam' he didn't follow Farah Khan's instructions.
“Katrina will be rigorously rehearsing her steps for 'Aaya re aaya bodyguard'. She wants it to be as perfect as 'Sheila ki jawaani'.
“Salman's improvisations are bound to distract her. But there is not much she can do about it. Because as Salman pointed out the song is about about him, so he has to be part of it.”
Produced by Atul Agnihotri, Alvira Agnihotri and Reliance Entertainment, ‘Bodyguard’ is a remake of the Malayalam film with same name directed by the Siddique.
‘Bodyguard’ is scheduled to release on Aug. 31, 2011.
Will Salman and Katrina impress the audience with their pair-up? Let's wait and watch.