Yes, that I agree! The popularity of Bollywood and regional cinema in overseas countries is due to the ever increasing Indian population in those respective countries. But certain actors enjoy a good fan following among non-Indians too. For example, Shahrukh khan has an increasing fan following among non-Indians in the US and UK. Tamil actor Rajnikanth's films are very eagerly watched by the Japanese people (they await his films just like his fans in South India await).