Ranbir Kapoor will be seen locking horns with Sanjay Dutt in the upcoming film 'Shamshera'. In the third episode of a three episodic candid video series titled 'RK Tapes', Ranbir opened up about the importance of antagonists in films.

"We invariably side with the hero. But if there was no villain for the hero to show his heroism, how would a hero be a hero? I have a dream that once I will do a negative role and people will tell their kids 'so jaa, so jaa nahi toh Ranbir aa jayega'," he quipped.