The margarita was allegedly invented in the 1940s (possibly 1938) at the Rancho La Gloria bar, Tijuana, by bartender Carlos 'Danny' Herrera for fledgling actress Marjorie (Margarita) King who was allergic to most other kinds of alcohol. An alternate legends says Francisco 'Pancho' Morales, a bartender in Tommy's Bar in Ciudad Juarez, made the first margarita on July 4, 1942.
Yet another story attributes the drink to Margarita Sames, a Texas socialite who brewed up the cocktail for guests at her Acapulco villa, as a challenge in 1948. Her friend Tommy Hilton allegedly took it from there to his hotel chain. In late 1999, she was introduced as the drink's originator at a book signing for The Original Guide to Margaritas and Tequila (BarMedia) by Tucson authors Robert Plotkin and Raymon Flores.