When Abhishek Bachchan says to Hrithik Roshan that his father used to always decide something using a coin, this happened in Sholay when Amitabh Bachchan used to decide something using a coin.
Sushant Singh Rajput was background dancer in the title song Dhoom Machaale Dhoom.
The kissing scene between Hrithik Roshan and Aishwarya Rai Bachchan caused a court case for obscenity.
The entire lead cast had to attend vigorous training in order to get into shape for the film. Aishwarya Rai Bachchan had to lose weight, and Hrithik Roshan had to gain it.