celebrity
I have known lots of non-celebrities who have amazing talents.
Non-celebrities who go on the show have an enormous amount to lose.
The police have made a special effort to treat celebrities and noncelebrities the same way.
They had a simple wedding surrounded by their non-celebrity friends.

SMART Vocabulary: related words and phrases

Plain and ordinary
as it comesidiom
austere
austerely
austerity
average Joe
homespun
homey
humble
humdrum
middle-of-the-road
sparely
spartan
stale
starkly
starkness
unostentatious
unostentatiously
unpainted
unremarkable
unremarkably