Monticelli was born in Milan about 1710. He first appeared in public in Venice in 1728, in Le due rivali in amore by Tomaso Albinoni, and then in various cities in Italy, including Treviso, Padua and Verona; there were further appearances in Venice, including in 1731 and 1732 with Giovanni Carestini, Antonio Bernacchi and Faustina Bordoni.[1][3] He was a member of the Wiener Hofmusikkapelle from 1732 to 1740, also appearing in Italy during this period.[4]
He came to London in the autumn of 1741, making his début in the pasticcio Alessandro in Persia. In early 1742 he appeared in the opera L'Olimpiade by Giovanni Battista Pergolesi; Charles Burney wrote that "the whole scene, in which 'Se ceroa se dice' occurs, was rendered so interesting by the manner in which it was acted as well as sung by Monticelli that the union of poetry and music, expression and gesture, have seldom had a more powerful effect on an English audience".[1] His fame grew, and he was considered one of the best castrati of the time.[3]
He continued to perform in London; in 1744 he sang, in Alfonso, songs of more bravura execution than he had previously attempted, and in 1746 he was in Gluck's La caduta de' giganti. Antigono by Baldassare Galuppi, produced in May of that year, was the last opera in which Monticelli was seen in London. He appeared in Naples with Regina Mingotti in the same year, and afterwards in Vienna. In 1753 Johann Adolph Hasse engaged him for the court opera in Dresden.[1] He died in Dresden, in September 1758 (according to a letter by Pietro Metastasio)[3] or in 1764 (from other sources).[1][4]
