Before Amar, Mehboob Khan had made Aan in colour but he thought that Amar will look good in b/w. Later Mother India & Son of India were made in colour. Amar came in between these films. Music meastro Naushad Ali and cinematography Fareedom Irani, worked in most Mehboob Productions.
Meena Kumari was originally cast and even shot scenes for the film but had to bow out due to scheduling conflicts. Madhubala replaced her.
Raj Kapoor insisted Mehboob Khan to cast Nargis after Meenal Kumari opted out But Dilip Kumar convinced him to cast Madhubala.
One of the earliest film to deal with controversial subject of rape.