As per reports, actor Amitabh Bachchan has been roped in for 'Dhoom 4', which will be the fourth film of Yash Raj Films' 'Dhoom' franchise. Hrithik Roshan, who played villain in 'Dhoom 2', has also reportedly been signed for the film. Abhishek Bachchan and Uday Chopra will play cops in the film, similar to the previous three installments.