She is the daughter of Conte Don Roberto Gaetani dell'Aquila d'Aragona and Nora Elisabetta Pattison, descendant of a family of English shipbuilders and engineers.
In 1973, Gaetani designed the costumes for Saturday, Sunday, Monday by Eduardo De Filippo, at The Old Vic, London, directed by Franco Zeffirelli, starring Laurence Olivier and Joan Plowright.
[1] From 1974 she started regularly cooperating with Eduardo De Filippo, for whom she designed stage sets and costumes for productions in Rome, Naples and Florence.
At the National Theatre in London she created stage sets ad costumes for Inner Voices with Ralph Richardson, directed by Mike Ockrent.
In 1984, Gaetani designed the costumes of Ghosts by Ibsen directed by Kirsten Sørlie at the Rogaland Theater in Norway,[2] followed by Saturday, Sunday, Monday and La grande magia by De Filippo.
She designed the costumes for Peer Gynt by Jamey Hampton (Grand Théâtre de Genève) and for Capriccio for Piano and Orchestra by Igor Stravinsky with choreography by Lorca Massine (Rome Opera).
[7] Gaetani collaborated with distinguished Italian directors, such as Armando Pugliese, Carlo Cecchi, Enrico Maria Salerno, and Mario Monicelli.