Indefinite article: FAMOUS versus CELEBRITY

[Jesus1]

Hello! how is it going?

Take a look at these sentences.

1.- He is famous/(a) celebrity
2.- They are famous/celebrities

1.- Famous is an adjective, and celebrity a
noun. Must I use the indefinite
article if I use ?celebrity??

2.- Can I use ?celebrities? to mean
?famous people' ? Do both of
these sentences mean
the same?

?They are famous?
?They are celebrities?

Thanks again!

[Conchita]

1. Yes.

2. Yes.