[1] Her film debut came at the age of 15 in The Sky Is Red (1950), and she was soon cast in such films as Il conte di Sant'Elmo (1950) and The Forbidden Christ (1951), the only movie directed by the noted writer Curzio Malaparte.

[2] Ferrero's career progressed quickly as she worked with prominent directors, such as Michelangelo Antonioni on I vinti, and actors, like Marcello Mastroianni in Carlo Lizzani's award-winning Chronicle of Poor Lovers (1953).

She appeared with Vittorio Gassman in six films: Lorenzaccio, King Vidor's War and Peace, Kean, which Gassman co-directed, Giovanni dalle bande nere, Le sorprese dell'amore, and Il mattatore.

Her last on-screen appearance was as a housewife who accidentally ingests cocaine in a comic episode of the anthology film Controsesso (1964), directed by Franco Rossi.

Ferrero chose to end her career shortly after her 1963 marriage to French actor Jean Sorel, her co-star in two films: Gold of Rome (1961) and Four Days in Naples (1962).