Mehmood had made the film for his polio stricken son Macky Ali who starred in the film.
Comedian 'Mehmood' made his debut as a director with the film and the enormous goodwill he enjoys in the film industry was proved when many top stars made guest appearances.
Rajesh Roshan benefited from the success of the movie - the music composer had signed around 20 films within a fortnight of its release.
This film was Tamil actress Achi Manorama's, only film in Hindi, however her lines consisted of some Tamil.
One of Mahmood gem's.... poliomyelitis awareness through the movie was well appreciated and this movie and manly it's songs were massive hits..... after this success ..mehmood tried other movies but none enjoyed the success of kunwara baap