The Joker producer said that she has taken responsibility for promoting and publicising the Kunder-directed film.
"I am a people person and Shirish is not very media friendly and he does not want to be either. He feels that it won't make a difference if he talks about the film until people like the film," she told Bollywood reporter Sunny Malik.
Khan, who made her acting debut earlier this month with Shirin Farhad Ki Toh Nikal Padi, said that she was excited to be working as a producer for the first time.
"I am a debutante actress and debutante producer, all within a span of two weeks. It is exciting and I am hoping that the film does well because then I will have a hit product to my name."
The director of projects including Om Shanti Om and Main Hoon Na went on to explain why she has not shot outside India, as is the trend with many commercial Hindi filmmakers.
"If we get a script that requires the film to be set in London, we will have to shoot there then," she said. "With Joker, it really required a village in India where they don't even have electricity or water. We required a village that has been forgotten on the map of India."
The Hindi sci-fi adventure tells the story of a fictional village called Pagalpur which was overlooked during the partition of India and Pakistan, and - having no national affiliation or recognition - remains stuck in the past.
Khan added: "If we feel we have to do a story about something that only happens in Britain, we will shoot it there. But how many films that are shot in London actually require being set there because of the story? How many of those movies are actually London centric?
"These stories can be set in Delhi, Mumbai or anywhere. Filmmakers want a glamorous look. That's why they go and shoot over there."
Joker was released on Friday (August 31).
Watch a trailer for the film below: