Singer Sonu Nigam has composed the title song for Anil Sharma's upcoming movie "Singh Saheb The Great".

"It was Anil Sharma's idea that Sonu should compose a song for the film. Both have known each other for a long time. Once Sonu composed the song, it was taken to Sunny Deol for him to hear and he instantly liked it and included it in the film," said a source.

The number is sung by Rahat Fateh Ali Khan, with lyrics by Kumar. The movie stars Sunny Deol, Amrita Rao, Prakash Raj and Urvashi Rautela.

"Sonu didn't use his own voice, but recorded it with Rahat Fateh Ali Khan. Sonu felt Rahat's voice would suit Sunny Deol the best," the source added.

The movie is expected to release in August.