Teaser of 'Amar Singh Chamkila' was unveiled by the makers on May 30. The announcement video saw a glimpse of Diljit Dosanjh as the iconic singer Amar Singh Chamkila. The film is directed by Imtiaz Ali whereas its music will be composed by AR Rahman. Just in case, you want to know all things about the late musician, then you are at the right place. Watch this informative video now.