Petrolo and Gregori first met in 1986, when they both worked as cartoonists for the same publishing house, ACME (Petrolo as author of
Zio Tibia, realized together with
Michelangelo La Neve, while Gregori for
I sottotitolati). When in 1991 the publishing house failed, the two decided to engage in new projects, most notably the creation of a
comedy rock group,
Latte & i Suoi Derivati ("Milk & Its Derivatives"). == Filmography ==