Ruggiero Leoncavallo has been played over 10 times on NTS, first on 8 August 2021. Ruggiero Leoncavallo's music has been featured on 4 episodes.

Ruggiero Leoncavallo (April 23, 1857- August 9, 1919) was an Italian opera composer.

The son of a judge, Leoncavallo was educated at the Conservatorio San Pietro a Majella in his native city, Naples (the date 1858, given for his birth in older histories of music, is incorrect). After some years spent teaching and in ineffective attempts to obtain the production of more than one opera, he saw the enormous success of Mascagni's Cavalleria Rusticana in 1890, and he wasted no time in producing his own verismo hit, Pagliacci. (According to Leoncavallo, the plot of this work had a real-life origin: he claimed it derived from a murder trial over which his father had presided.)

Pagliacci was performed in Milan in 1892 with immediate success; today it is the only work by Leoncavallo in the standard operatic repertory. Its most famous aria Vesti la giubba ("Put on the trappings" or, in the better-known older translation, "On with the motley") was recorded by Enrico Caruso and became the world's first record to sell a million copies.

The next year his I Medici was also produced in Milan, but neither it nor Chatterton (1896)—both early works—obtained any favour, and it was not until La Bohème was performed in 1897 in Venice that his talent obtained public confirmation. (Its two tenor arias are still occasionally performed, especially in Italy, yet it was outshone by Puccini's opera of the same name and on the same subject (albeit a better libretto), which was premiered in 1896.) Subsequent operas by Leoncavallo were Zazà (1900) (the opera of Geraldine Farrar's famous farewell performance at the Met), and Der Roland (1904). Nothing from the latter opera is heard today, but the baritone aria from Zazà is still sometimes sung.

Leoncavallo also wrote songs, most famously Mattinata. He died in Montecatini, Tuscany, in 1919.

Leoncavallo was the librettist for all of his own operas. Many considered him the greatest Italian librettist of his time after Boito. Among Leoncavallo's librettos for other composers is his contribution to the libretto for Puccini's Manon Lescaut.