Aag is a 1948 Indian Hindi language musical drama film which is produced, directed by and stars Raj Kapoor. The film marked the debut of Kapoor as producer and director and was the first film produced by his R.K. banner. Nargis, Premnath, Nigar Sultana and Kamini Kaushal also starred in supporting roles. Raj Kapoor's youngest brother Shashi Kapoor appeared as a child artist in this film playing the younger version of his character (Kewal). This marked the first of more than a dozen films in which Raj Kapoor and Nargis appeared together

Raj Kapoor, also known as Ranbir Raj Kapoor, was an Indian actor, film director and producer, who worked in Hindi cinema. He is considered one of the greatest and most influential actors and filmmakers in the history of Indian cinema, and has been referred to as The Greatest Showman of Indian Cinema and as the Charlie Chaplin of Indian Cinema.