The director was forced to halt filming on Heroine after her pregnancy was announced on Twitter by her father-in-law Amitabh Bachchan.
Writing on his blog, Bhandarkar said: "The truth was hidden from us. We learnt about the entire thing from news channels like the rest of the world that the said actress was four months pregnant and she was due in November.
"Film making in Mumbai film industry is not a mere business but one big fraternity who functions on total faith and trust."
Bhandarkar admitted that he is devastated about the scrapped project, which was reportedly inspired by the life stories of old Hollywood heroines.
Bhandarkar revealed that he felt he had no choice but to end the shoot, which was still in the early stages.
"Cinema is a visual medium and keeping in mind the physical state of the actress, the total interpretation of the character of a diva and the story would land up in major jeopardy post 65 days of her pregnancy," he wrote in his blog.
The pregnancy has led to rumours about producers wanting to put in "no pregnancy" clauses in contracts with their stars in order to avoid filming delays and cancellations.
