Raj Kapoor dropped Ranbir from his name before embarking on his film career.
When Raj Kapoor was a clapper-boy, a good many moments came to pass which would change his life dramatically. When Kidar Sharma was filming "Vish Kanya", Raj would always comb his hair and pose in front of the camera and only then give the clap. On the spot, Sharma wanted to take a close-up as the sun was going down and told Raj Kapoor not to comb his hair. But Raj caught the hero's beard in the clapperboard and it came off. Sharma lost his temper and slapped him in front of the whole unit.