Mario Fortino Alfonso Moreno Reyes (12 August 1911 – 20 April 1993), known by the stage name Cantinflas (Spanish pronunciation: [kanˈtiɱflas]), was a Mexican comedian, actor, and filmmaker. He is considered to have been the most widely-accomplished Mexican comedian and is celebrated throughout Latin America and in Spain as a popular icon. His humor, loaded with Mexican linguistic features of intonation, vocabulary, and syntax, is beloved in all the Spanish-speaking countries of Latin America and in Spain and has given rise to a range of expressions including cantinflear, cantinflada, cantinflesco, and cantinflero.

Though some of his films were translated into English and French, the wordplay was so particular to Mexican Spanish that it was difficult to translate. He often portrayed impoverished farmers or a peasant of pelado origin. The character allowed Cantinflas to establish a long, successful film career that included a foray into Hollywood. Charlie Chaplin once commented that he was the best comedian alive, and Moreno has been referred to as the "Charlie Chaplin of Mexico". To audiences in most of the world, he is best remembered as co-starring with David Niven in the Oscar-winning film Around the World in 80 Days, for which Moreno won a Golden Globe Award for Best Actor – Motion Picture Musical or Comedy.

As a pioneer of the cinema of Mexico, Moreno helped usher in its golden era. In addition to being a business leader, he also became involved in Mexico's tangled and often dangerous labor politics. His reputation as a spokesperson for the downtrodden gave his actions authenticity and became important in the early struggle against charrismo, the one-party government's practice of co-opting and controlling unions.Moreover, his character Cantinflas, whose identity became enmeshed with his own, was examined by media critics, philosophers, and linguists, who saw him variously as a danger to Mexican society, a bourgeois puppet, a verbal innovator, and a picaresque underdog.