Tamil actor Vikram's son Dhruv was arrested after a car allegedly driven by him rammed into a parked autorickshaw, injuring its driver, early on Sunday, police said.
He was released on own bail later, police said.
A case had been registered for rash, negligent driving and causing hurt, endangering life of others.
The incident took place on the TTK Road at around 3.50 am. Auto driver Kamesh had been admitted to the Government Royapettah Hospital, city traffic police said.
The autoricksaw had been damaged severely, a police official told PTI.
When asked how the accident occurred, police said further investigations were on.