The actor, during the first promotional event for the movie in the capital, also revealed that he was not the only one to be left with wet-eyed.
"When we read the script we were all in tears," he said.
And though he's had a lot of hits under his belt, Anil insisted that the movie, which is also his first as a producer, is by far one of the best ones of his career.
"This is by far one of the best films I have done in my entire career. I felt that I must make this film," he said.
Director Feroz Abbas Khan also revealed just why he had decided to take up a period film, especially one that dwells into the life of the Mahatma's relationship with his son Harilal Gandhi.
"You don't make a period film because you need to do it. You do it to ask the question how does it connect with you now. And it is this that drove me while writing the film, directing the film and then editing it with Mister Shekhar Prasad," he said.
"I realised that it is these values and principles that Gandhi stood for that may have hurt the son and the family, but if is these values that made a nation," he added.
And he certainly has done a fine job, for the Mahatma's great-grandson Tushar Gandhi was full of praise for it.
"I admire the courage shown by the filmmaker in being very, very balanced in the manner in which he had portrayed this tragedy between a father and a son, a mother and a son, and two sides of a husband and a wife," he said.
Shot in South Africa and several cities in India, the movie is scheduled to hit theatres on August 3 this year.