The third instalment of the action-thriller series, directed by Vijay Krishna Acharya and produced by Aditya Chopra, will hit theatres on December 20.
Abhishek (a police officer) and Uday Chopra (playing a thief) are reprising their roles from earlier editions, while Aamir plays a villain in 'Dhoom 3' and Katrina Kaif is his love interest.
"This time the film is edgier, bigger and better. It has more of emotions. I had fun catching up all the three villains. They operated in different circumstances and are different from each other. Aamir has pushed the envelope...He has gone beyond. I think this will be his most brilliant and memorable role," Abhishek said.
Junior Bachchan was speaking at the trailer launch of 'Dhoom 3' here tonight.
The 37-year-old actor, who hurt himself recently while working out in gym, said he was fine now. "I had a torn tendon in my elbow. My health is fine...Elbow is much better.