multimillionaire
She's a multi-millionairess and one of the most-recognized women on the planet.
Her books have made her an international name and a multi-millionairess.
He was married to a South African diamond multi-millionairess.
Both women are now multi-millionairesses.

SMART Vocabulary: related words and phrases

Rich people
advantaged
baller
beautiful
champagne socialist
deb
elite
gilded
laird
magnate
millionairess
moneybags
multibillionaire
preppy
scion
socialite
squattocracy
squillionaire
the beautiful peopleidiom
the jet set
yuppify