'Dhoom 3' first stills: Aamir Khan, Katrina Kaif look effortlessly stylish

Even as Aamir Khan performs daredevil bike stunts and Katrina Kaif flaunts her gymnastic skills, these actors wow fans with their jaw-dropping looks. 

Aamir Khan, who is popular for the thought-provoking roles he has played till now, is all set to wow fans with his first negative role. 

For the uninitiated, Aamir Khan essays the role of a circus gymnast in 'Dhoom:3'. 

'Dhoom 3' presents Katrina Kaif, who has been labeled as a fragile and feminine Barbie doll, in a never-before-seen avatar. 

Dhoom 3 is the first Bollywood film to have been shot extensively in Chicago. 

Since she essays the role of a gymnast in the film, it was obvious for Katrina Kaif to get in shape. 

Katrina's personal trainer Yasmin Karachiwala had planned a new fitness regime as her role calls for flexibility, physical strength and agility. 

"Kat needs to get flexible and lean, so when she returns from London, we will change her workout routine," Yasmin Karachiwala was quoted as saying. 

In addition to his action sequences, he will also be seen performing a trademark movement in the movie. 

The actor has been investing additional hours to ensure he performs every bit in a flawless manner. 

Aamir Khan, who left no stone turned to sculpt eight-pack-abs in 'Ghajini', flaunts a well-toned body in his forthcoming film also. 

Aamir Khan reportedly learnt ballet, aerobatics, and French technique of parkour, a movement that focuses on negotiating obstacles with speed and efficiency. 

Written and directed by Vijay Krishna Acharya and produced by Aditya Chopra, the action thriller features Uday Chopra who reprises his role as a police officer. 

Bachchan junior, as reports have been stating, lost nine kilos to prepare for his role.

Aamir Khan has been investing additional hours to ensure he performs every bit in a flawless manner. The film will release on December 20.