On the advice of her father, who was in favor of a diplomatic career, Pieroni began attending a faculty of political sciences.
[5] She also starred as a mysterious music student in the 1980 horror film Inferno by Dario Argento, and worked with him again playing a shoplifter in Tenebrae two years later.
Pieroni was offered to reprise the role of Mater Lachrymarum in Argento's 2007 film Mother of Tears, but turned it down.
However, the Gancia-Pieroni engagement fell apart after she met and got romantically involved with Bettino Craxi, the secretary of the Italian Socialist Party (PSI).
Pieroni returned to public life when she helped and participated in the election campaign for Silvio Berlusconi's party, Forza Italia.