Fernand Petiot, a bartender at Harry's New York Bar in Paris, claimed to have invented the Bloody Mary in 1921, originally calling it a "Bucket of Blood" and consisting of just vodka and tomato juice. Later, in 1934, at the King Cole Room in New York’s St. Regis Hotel, he refined it by adding spices, as part of an evolution of George Jessel’s earlier version. The drink’s name, recipe, and popularity evolved over the years, with claims from both the 21 Club and Harry's Bar as contributors to its development.