A look-alike, double, or doppelgänger is a person who bears a strong physical resemblance to another person, excluding cases like twins and other instances of family resemblance.
A selfie of American politician Chris Coons (left) and German politician Olaf Scholz, who have been noted to resemble each other
Look-alikes of Stalin, Putin, and Lenin posing with tourists in Moscow
Illustration from the paper "Look-alike humans identified by facial recognition algorithms show genetic similarities"
Bernard Montgomery
Celebrity is a condition of fame and broad public recognition of a person or group as a result of the attention given to them by mass media. An individual may attain a celebrity status from having great wealth, their participation in sports or the entertainment industry, their position as a political figure, or even from their connection to another celebrity. 'Celebrity' usually implies a favorable public image, as opposed to the neutrals 'famous' or 'notable', or the negatives 'infamous' and 'notorious'.
Choregos and theater actors, from the House of the Tragic Poet, Pompeii, Italy. Naples National Archeological Museum.
Charles Dickens was an international literary celebrity by the mid 19th century. The reaction at his public readings, where "people sometimes fainted at his shows", have been compared to those of a contemporary pop star.
Charlie Chaplin as the Tramp in 1915
LeBron James has had endorsement contracts with AT&T, The Coca-Cola Company, Crypto.com, General Motors, PepsiCo, McDonald's, Nike, Upper Deck, Walmart, and State Farm.