Some 127,000 adults voted in the poll, which was open to everyone, not just to members, who must themselves pass a similar rating system in order to join the exclusive dating community.
Princess Grace came in first with a 91% approval rating; Queen Rania came in a close second with 90%, Miss Middleton was third with 84%, and Diana fourth with 82% of the votes.
royal ever in an online survey, just below Princess Grace and Queen Rania of Jordan.
The late Diana, Princess of Wales was voted in fourth place.
The exclusive online dating community, BeautifulPeople.com, provided a list of royals and told voters to choose who was the most beautiful.