After the success of Dostana, producer Yash Johar with a lot of fanfare, launched a movie tittled John Jaani Janardhan with Manmohan Desai as the director fresh from the success of Naseeb. But then the film was shelved instead Yash Johar started Duniya with a successful director Ramesh Talwar who made a good and successful film at that time Baseera.
The speciality of this 1984 released film is, it has Legends from the golden era like, Ashok Kumar, Dilip Kumar, Pradeep Kumar, Pran and Saira Banu. Saira Banu had already retired but after 10 years she did a special appereance with her husband. Dilip Kumar and Saira Banu appeared together in a film for the last time and Lata Mangeshkar sang a beatiful song for Saira, 'teri meri zindagi, pyar bhari zindagi......' then also Rishi Kapoor, Amrita Singh, Om Puri, Kulbhushan Kharbanda, Prem Chopra and Amrish Puri, were also in this film, the credit goes to Yash Johar, Ramesh Talwar, Javed Akhtar, R.D.Burman and Jal Mistry for this masterpiece.
Salim Javed had a very bad fallout with Yash Johar after Dostana. The matter was over money. Yash even took the duo to court. When Ramesh Talwar decided to make Duniya, he made Yash Johar and Javed Akhtar patch up. This was after the Salim -Javed split. But after the film flopped, Javed told Talwar, "He was a finished man". He put the entire blame on Ramesh Talwar. But the truth was Javed harassed Ramesh thru out the making of the film. The script was given in bits and pieces . People figured out that Javed had signed Duniya and Mashaal at the same time and both films were basically the same. Javed divided one story into two films. He gave one half to Duniya and the other half to Mashaal. He kept switching scenes between both films.
After about 5-6 years Saira Banoo made comeback as special appearance in this movie opposite her husband Dilip Kumar. They came together in Duniya after Bairaag. Duniya was last appearance of Saira Banoo in movies.
Ramesh Talwar told Yash Johar the film's subject was ordinary. But Yash did not want to listen. The film kept getting delayed because Javed Akhtar had to rework the script . Even after the changes were made,Ramesh Talwar disliked the story .
Om Puri stated he had no interest to do the film. He was offered the film and he refused. But the director Ramesh Talwar was stuck and asked Om to do the film as a favor. Plus he would be paid well. Om Puri finally agreed.
Dilip Kumar and Rishi Kapoor were to act together in film of Nasir Hussain's Zabardast which was shelved.Then after some years they worked together in Duniya and in both movies they were to play father and son.