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

Premnath Malhotra, better known as Prem Nath was an Indian actor and director, who was best known for his works in Hindi films. Nath made his debut with the film Ajit (1948), and went on to appear in over 100 films throughout his career. He was nominated for three Filmfare Awards, and later retired in 1985.