 Taking advantage of the availability at the King’s Theatre of both Parma main performers, Millico and Antonia Maria Girelli Aguilar, an original Gluck version of "Orfeo and Euridice" in one act was billed in summer 1773, but it turned out to be a complete fiasco and was dropped after only two performances.On his way back homeward in 1774, Millico called on Gluck in Paris and, as the French version of "Orfeo ed Euridice" was in laborious rehearsal, the composer would give two private test performances "at the house of the Abbé Morellet in which the tenor role of the French score was sung by Millico (with Gluck's niece Marianne taking both Eurydice and Cupid, and with Gluck at the harpsichord)".After performing at Venice, Florence, Rome and Milan, Millico returned to Naples in 1780, where he became highly popular as a composer and teacher.