Grandmother of actress Virginia Sanjust Di Teulada and Beatrice Sanjust Di Teulada (Antonella's daughters). Former mother-in-law of Giovanni Sanjust. Greatgrandmother of Giancarlo Armati.
In 1974 she debuted in France as a singer with some success and critical acclaim, then she also debuted on stage with the comedy Le Moulin de la Galette, with which she toured across several European countries.
In 2020 Antonella Lualdi received the award " Premio Cinema italiano Anni d'oro", for her role in the 1959 movie "La notte Brava" (Bad Girls Don't Cry), directed by Mauro Bolognini.
Lualdi began her career in 1949, after having won a contest for new talents of the cinema magazine Hollywood, in which she was presented as "Signorina X" ("Miss X"), inviting the readers to choose her stage name.