William Gezzio is a comic artist and cartoonist from Montevideo, Uruguay. Born in Nueva Palmira, Colonia, he attended the Panamerican School of Art between 1961 and 1963. Gezzio has made illustrations, caricatures, animations, comics and cartoons for various media from Uruguay and Argentina. He made his debut in newspaper El Día in 1965, and has since published his work in papers like La Mañana, El diario de la noche, El País, Mundo Color, La República and Ultimas Noticias, as well as the supplements El Escolar (El País), La Pulga (El Dario) and El Día de los Niño (El Día).
Gezzio is the creator of comic strips like 'Patatín y Patatán' (1978), 'La Pensión 64', 'Tatucito', 'Los Risatómicos', 'Tente y sus amigos', 'Bombón', 'Pepe Ñandú', 'Nicolás Parletti' and 'El canilla Libre'. He drew for magazine Charoná for nearly 40 years and was also a contributor to Mundo Uruguayo, Al Rojo Vivo, Patatín y Patatán, Colorín colorado, El Dedo, Guambia, Berp, Tío Taba, La Pipeta, Quimera, Balazo and Estado de Humor. He was additionally present in Argentine publications like Patoruzito and Rico Tipo, as well as the Spanish fanzine Nemo.
In 2006 he succeeded Enrique Ardito as the artist of the adventure strip 'Viviana y Yamandú' in the Montevideo newspaper La República. The comic was canceled in 2012. His cartoons have appeared in Guambia and his own magazine Estado de Humor, and he has illustrated books for publishers like Capitel and Lumen.