Mumbai, Sept 12: Bollywood actor Ranbir Kapoor and film director Imtiaz Ali promoted their upcoming film ‘Rockstar' in Mumbai on Sunday.
Kapoor, who plays the lead role, described the film as a musical journey and a love story of a local Delhi boy who transforms into a famous rockstar.
The director of the film, Imtiaz Ali, informed that the music of the film, will be launched on September 20.
