Guido Alberti was an independently wealthy industrialist, whose father had built a nougat and wine business of which Guido became chairman of the board in the 1950's. He grew interested in acting and, after his official debut in Fellini's 8 1/2, grew more and more in demand through the cycles of the Italian film business. He even found himself cast in a few American productions such as BOBBY DEERFIELD and SAVING GRACE. He married a famous astrologer Lucia Alberti who died the year before him in 1995.

Guido Alberti est le fils de Ugo Alberti, l'un des patrons de la société de confiserie Alberti et de la distillerie Liquore Strega, implantée à Bénévent. Il entre très jeune dans la société de son père et devint président du conseil d'administration en 1957.

Tout en menant cette activité, il est acteur dans de nombreux films italiens, surtout à partir des années soixante.

Il fut par ailleurs l'un des principaux mécènes du prix Strega.