In the last couple of years, the 48-year-old star gave hits in the form of "Taare Zameen Par", "Ghajini" and "3 Idiots" and his role in each of them was as different as chalk to cheese.

"I think 'Dhoom 3' is my toughest role so far. I have never played anything like this before," said Aamir. "Every film is challenging, but this was a tough role. I had a great time working in the film," he said on Wednesday at the trailer launch of the film.

In terms of preparation, the actor had to work out a lot for "Dhoom 3".

"I am playing a gymnast in the film. I also went for circus training for the film. There was a lot of hard work for the film. I followed a strict diet," Aamir said.

The actor plays a negative role in director Vijay Krishna Acharya's sleek and stylish thriller. "I liked the story and I was amazed after reading the script. I am not playing a typical Hindi cinema villain in 'Dhoom 3'. I don't want people to feel I am playing a villain," said Aamir.

Abhishek Bachchan, his co-star in the film, was also present at the event.

"'Dhoom 3' is much more edgy. I wouldn't call Aamir villain of the film," said Abhishek who featured in the earlier two parts of "Dhoom" that started in 2004.

Also featuring Katrina Kaif and Uday Chopra, the film will release on December 20.


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