Born Maria Luisa Longo in Venice, Italy, she moved to Rome at a young age where she started a career as a model. She entered the Miss Italia beauty contest, winning the Miss Cinema and Miss Lazio titles. After appearing in a number of commercials, she made her acting debut in 1968 in the Antonio Margheriti's giallo film The Young, the Evil and the Savage. She then appeared in other films, sometimes in main roles, and was especially active in the Nazi exploitation and commedia sexy all'italiana genres.
She performed a cameo in Bruce Lee's film The Way of the Dragon.
Longo was directed three times by the master of Italian erotica, Tinto Brass, in films such as Salon Kitty (1976) and Miranda (1985), in which she played opposite Serena Grandi.
She retired from acting in 1997. In 2000 she debuted as a writer with the novel Così come sono, and her works include poetries (Il cantico del corpo) and essays (Aggiungi un seggio a tavola).
Longo was married to film producer Riccardo Billi and resides in Chicago, Illinois.
