The action thriller has been directed by Siddharth Anand and is the official remake of Hollywood film "Knight and Day", which starred Tom Cruise and Cameron Diaz.
"'Bang Bang' is the first film in which instead of getting into the character I discovered that I was the character. It was a self-discovery for me," Hrithik said.
The 40-year-old actor said all the characters he has played till now have had a part of him and he has vent his real-life emotions through them.
"All of them are bits of pieces of me. But there are some roles that come our way and at a time when it becomes a platform to vent or channelise a similar emotion that you are going through in real life. I have had such experiences while doing 'Kaho Naa Pyaar Hain', 'Koi Mil Gaya', 'Lakshya' and 'Guzaarish'," he added.
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When asked why he decided to become an actor, Hrithik, who made his Bollywood debut in 2000 with "Kaho Naa Pyaar Hain" directed by his father, said it was his stuttering problem and fear of facing the camera that made him choose acting as a career.
"I think I wanted to do it as I knew that if I did not do this it will be unfair. This was one thing I feared most as I had the stuttering problem and if I tried to say a dialogue I could not. I had no choice... I had to fight that demon in my head that said that it was not possible and I could not do it," he said.