Mumbai: Karan Johar may be a big fan of Emraan Hashmi but the producer-director is keeping mum on reports that the "Dirty Picture" actor is starring in his next production, directed by Rensil D'Silva.

There was a time when Hashmi used to be mostly seen in films produced under Mahesh Bhatt's 'Vishesh Films' banner. However, with films like 'Dil Toh Bachcha Hai Ji' and 'The Dirty Picture', it seems Emraan has moved on.

"When we make a formal announcement, then you would come to know everything...what is the title of the film and about the cast," Johar told reporters here last night, at the album launch of 'Rang – Colors of Sufism'.

"I am a big fan of Emraan Hashmi. He has done really well for himself and has done good work. And talking about Sufism, one of my favourite songs is 'ishq sufiyana' from Emraan's film," Johar said.

Times Music has released an album, 'Rang - Colors of Sufism', comprising renditions and interpretations by sarod artistes Amaan Ali Khan and Ayaan Ali Khan, sons of sarod maestro Ustad Amjad Ali Khan, of timeless Qawwalis.

"I liked the album the way they have played the sarod, composed the music and presented the song. They are youth icons in this musical industry. Every year, there is more and more demand for Sufi music, but through Amaan and Ayaan, if the music reaches the people, the impact is much larger and greater," Johar said.

"Me and my brother have always tried combing different Indian art forms that can come together to create something  extraordinary. We are happy the way the album has come out.

Hope everyone likes it," Amaan said.

The album is a confluence of six tracks like 'Mann Kunto Maula', 'Aaj Rang Hai', 'Bahaut Din Beete', 'Main Nizaam', 'Zihale Miskin' and 'Kaahe Ko Byaahe Bides'.

"It is a very special album for us. I hope everyone enjoys our most recent work," Ayaan said.