Salman Khan has agreed to do an item number in pal Ajay Devgn's forthcoming film Son Of Sardar and that too totally free. For a peppy track within the film, Ajay and his team zeroed down on Salman as they felt he was probably the most suitable man for the song.

As Ajay offered Salman to do the song, he immediately agreed to do the song and that too freed from cost. The song could be shot in a studio Mumbai, where a different set can be built for the song.

Salman and Ajay's friendship goes back a protracted way, they have got acted together in films like Hum Dil De Chuke Sanam and London Dreams. Last year Ajay had even done a cameo in Salman's film Ready.

Son Of Sardar is Ajay's home production being directed by Ashwini Dheer. It also stars Sanjay Dutt, Juhi Chawla and Sonakshi Sinha.