Extremely prolific, some of her most notable roles include La Dolce Vita (1960), Hercules in the Haunted World (1961), The Leopard (1963), The Whip and the Body (1965), Blood for a Silver Dollar (1965), Adiós gringo (1965), Django Shoots First (1966), Special Mission Lady Chaplin (1966), The Sweet Body of Deborah (1968), The Weekend Murders (1970), The Case of the Scorpion's Tail (1971), The Bloodstained Butterfly (1971), Knife of Ice (1972), Footprints on the Moon (1975), and The Psychic (1977).

This role caught the attention of Federico Fellini, who cast Galli in a small part in his 1960 film La dolce vita.

[5][3] Several of Galli's roles have been in the spaghetti Western genre, beginning with Un dollaro bucato, Adiós gringo and Perché uccidi ancora in 1965.

Galli has also featured in several giallo films, including Lucio Fulci's Sette note in nero, Umberto Lenzi's Il coltello di ghiaccio and Sergio Martino's La coda dello scorpione.

[4] Galli's son, Alessandro Cocco, briefly acted in films, appearing with his mother in Umberto Lenzi's Syndicate Sadists.