The actor takes on the role of the villainous Kancha in Karan Johar's remake of the 1990 original.
Dutt told The Times of India: "I loved the character. Kancha Cheena is so complex, crazy, dark, unpredictable and larger than life.
"I was an anti-hero in Khalnayak but this guy was something out of this world! I have never seen or played a character so dark and evil. Yet though Kancha is a very dark character, his lines are very funny!"
Dutt added: "I found Kancha extremely challenging as I haven't ever done something so dark before. I am not like him. The other day when I was dubbing for Kancha for the climax, halfway through, I asked the director to just stop!
"When he asked why, I said I couldn't bear it anymore and needed to go for a smoke, soothe my nerves and then start dubbing again. I had to stop dubbing for half an hour as I couldn't bear to see myself as someone so wicked, evil and crazy. After the dubbing, I called Maanayata and told her I can't believe it's me doing that! "
In June 2011, the star shaved his head for the role of the gang overlord.
Dutt has previously said that he does not usually enjoy playing villains on screen.