The terms are not mutually exclusive, but overlap in many ways; they can also be modified ~~ a star in a specific field would only be a celebrity to those with knowledge of that field, as I have said before. I do not happen to know who is the Tae Kwan Do champion of Scotland; but he is a star & a celebrity to the aficionados of that particular sport.

Ask 50 random passers-by who Martin Carthy is; I should be surprised of more than 10 could even venture a guess. Whereas to all of us on this forum...

Ronald Searle died last week. I mentioned this to someone, & was astounded she didn't know who I was talking about. Hands up if you don't...

~M~