 She was born in Genoa.In Morricone's film scores of the original Spaghetti Westerns directed by Sergio Leone, her dramatic voice was deployed as an instrument for the first time and to revolutionary effect, such as in "A Fistful of Dollars", "The Good, the Bad, and the Ugly" (in particular for "The Ecstasy of Gold" track) and "Once Upon a Time in the West".More recently, Dell'Orso collaborated with Italian composer Alex Puddu on the albums "Registrazioni al Buio" (2013, Schema Records), "In the Eye Of The Cat" (2016, Schema Records), "The Mark of the Devil" (2017, Al Dente) and "The Gambler" (2018).