An illustrious biopic of celebrated politician late Bal Thackeray is in the pipeline. The film will be produced by Shiv Sena leader Sanjay Raut. It will be announced with a short teaser at a mega event on as early as December 21, in the presence of Bollywood superstar Amitabh Bachchan and Shiv Sena chief Uddhav Thackeray. If the buzz is to be believed then Bollywood actor Nawazuddin Siddiqui has been approached to play the lead. This yet untitled film will be a bilingual, which will be made in Hindi and Marathi. The shooting of the flick will begin early next year.