Pakistani Qawwali and Sufi singer Rahat Fateh Ali Khan will once again take Bollywood by storm. Zaroori Tha, the hit soulful number sung by the legendary singer, will be the lead backdrop track of upcoming Bollywood Film Hamari Adhuri Kahaani.

The film featuring Emraan Hashmi and Vidya Balan will have various versions of Zaroori Tha. The lyrics and the mood of the song was just perfect for the film, felt the director Mohit Suri. He decided to incorporate the song, realising that it captures the pain and longing of lovelorn lead characters.

The film is about the coming together of two long-separated lovers who struggle to meet.

The romantic saga deals with societal pressure and family values that prevent the two lovers from uniting.

Mohit Suri was deeply moved by Rahat Fateh Ali Khan's Zaroori Tha and was waiting for the right plot to use it in his film. "I was deeply moved as the song has just the right amount of romance, pain and agony to touch a heart," said Mohit. The song will be used on Emraan and Vidya to describe their emotions.

Hamari Adhuri Kahani is ready for release on June 12 and it also casts National award winning actor Rajkummar Rao. Rajkummar plays Vidya's hubby and will be seen in a negative character. Vidya plays a married woman who meets her college lover after a gap.

Film buffs who enjoyed the sizzling chemistry between Emraan and Vidya in The Dirty Picture and Ghanchakkar are anxiously waiting for Hamari Adhuri Kahani.

The film has the perfect blend of emotion that is needed to narrate a mature love story.

Mohit Suri, in the past, has made films such as Ek Villain, Ashiqui2, Murder 2 and more. He was working on an emotional plot after directing a series of thrillers.

Soulful renditions by Rahat Fateh Ali Khan have always been popular in Indian films.

A disciple of late Ustad Nusrat Fateh Ali Khan, Rahat started to learn the nuances of music at the age of 3.

A musical album Zaroori Tha released earlier featured Gauhar Khan and Kushal Tandon. He had earlier collaborated with Rahat for the film Kalyug, which featured the hit track Jiya Dhadak Dhadak. Rahat's other hit tracks include Tere Mast Mast Do Nain from Dabangg and Sajda from My Name is Khan.