Ace choreographer Farah Khan has been roped in to do a song for Salman Khan and Anushka Sharma starrer 'Sultan'.

"Farah is doing a dance song for 'Sultan' as a favour to Yash Raj Films as Vaibhavi Merchant (choreographer) lost her father. Farah very graciously stepped in to do the song," sources said.

The song will be shot next week in Mumbai. Directed by Ali Abbas Zafar, 'Sultan' is a sports drama, set to release this Eid. In the film, Salman will be playing Sultan Ali Khan, a Haryana-based wrestler.

Recently Farah choreographed a love track from Shah Rukh Khan - Kajol starrer 'Dilwale' titled 'Gerua'.

The 'Om Shanti Om' helmer is busy working on her next directorial venture. "I am still working on my script. We have not approached anyone for the film," Farah said. Farah's women-centric drama film is likely to go on floors this year.