**Guglielmo Barnabò** (Ancona, 1885 – Rome, 1973) was a prolific Italian film actor, considered one of the most recognizable and appreciated character actors in Italian cinema. His long career spanned from the silent era to the 1960s.

Specializing in supporting roles, Barnabò often played bourgeois characters, impeccable professionals who were sometimes gruff, pompous, or severe: lawyers, doctors, professors, company directors, or dignitaries. His stage presence, understated elegance, and ability to bring depth even to brief appearances made him an irreplaceable figure.

Among his numerous appearances, films such as Mario Camerini's Il signor Max (1937), in which he starred alongside Vittorio De Sica, Renato Castellani's Sotto il sole di Roma (1948), and Steno and Monicelli's Guardie e ladri (1951), in which he played the memorable porter Bottoni, stand out. He worked with leading directors and starred alongside Totò in several films, demonstrating a versatile mastery in making even secondary roles unforgettable.