The part of Bhawani Singh was to be played by Pran but latter Sultan Ahmed decided that Raaj Kumar should do it. It is said during shooting, Raaj Kumar was required to hold an diamond neckless so was given a fake neckless, Jaani refused, he doesnt hold fake things, he insisted on real diamond neckless he was given than he agreed to shoot. Raaj Kumar used to call Sultan Ahmed Jaani Mughal E Azam.
During the mahurat of this film in 1978 the shot was to be taken on Rajesh Khanna and Amitabh Bachchan was to give the clap. Rajesh Khanna didn't want to reach at the sets before Amitabh Bachchan so so everytime he calls to inquire if Amitabh Bachchan had reached ? On the othet end also Amitabh Bachchan had the same problem, he would call to inquire if Rajesh Khanna had reached, Amitabh Bachchan wanted he.should reach after Rajesh Khanna, here Sultan Ahmed became restless. Than Amitabh Bachchan came and at the same moment Rajesh Khanna came and the mahurat shot was picturised on him and Amitabh Bachchan gave the clap. Sultan Ahmed got releif.
During the making of Dharam Kanta, Sultan Ahmed announced that he will make ' Sahebzaade Salim Anarkali with music by Naushd and will have, Dilip Kumar and Amitabh Bachchan, but this film was shelved.
Amitabh Bachchan was offered the film but he was busy with a another film. Pran was signed but then he was replaced by Raaj Kumar
Sultan Ahmed wanted nobody else, only Actor Om Prakash to act in one scene before the credit tittles. Usually Om Prakash acts in whole films and Om Prakash insisted his market price as others will pay him less, he didn't want to spoil his price. Sultan Ahmed paid Om Prakash the full market price.
Music Meastro, Composer Naushad Ali made a comeback after 8 years and the music was Gold.
Sultan Ahmed's mentor K.Asif 's daughter, Heena Kaushar was also given important role in Dharam Kanta.
The filmmaker Sultan Ahmed was assistant to K.Asif. At one time in 1970s Sultan Ahmed was to complete K.Asif"s Love And God. But then he could not.
Sultan Ahmed launched Gangaa Ki Dhaara after Datta in early 1990s with hit pair at that time, Anil Kapoor and Madhuri with music by Kalyanji-Anandji. Kamaal Amrohi gave the clap unfortunately Gangaa Ki Dhaara was shelved. Then he launched an untittled film and Bappi Lahiri recorded all the songs but the film wasn't made. Finally Hai Vikranta was made. After Jai Vikranta, Sultan Ahmed in 1996/97 launched a film tittled Raama with Adesh Srivastav recorded 4 songs , but the film was shelved and that was the last Sultan Ahmed announced a film.
Actually Pran was to do the role of Jeetendra and Rajesh Khanna father. But then Sultan Ahmed thought he should take Raaj Kumar in the place of Pran, to balance the film to make the film look bigger. Then Waheeda Rehman was signed. The film gained more weight.
Sultan Ahmed stated that Jeetendra and Rajesh Khanna competed with each other thru out the making of the film. The would crib about more footage and try to out do each other in every scene.
Cinematographer R.D.Mathur's his one of his last film. He did big major films like Mughal E Azam, Pakeezah, etc.
Sultan Ahmed made Dharam Kanta after his successfu major l film with Amitabh Bachchan Gangaa Ki Saugand.
Nathu Dada stated that through the 1982 movie Dharmakanta, he was badly injured on account of damage to a spinal twine. In one scene of the movie, Amjad Khan was imagined to throw him and catch the opposite artist however he fell from a peak and acquired injured. After this they returned to their village. Tried to go to Mumbai once more however the relations didn't let go and acquired married.