Eugenio Cavallini (16 June 1806 — 11 April 1881) was an Italian conductor, composer, violinist, and violist.
 In 1833 he became first violinist of the orchestra at La Scala, a post he held through 1855.
 He also served as a conductor at La Scala, notably leading the world premieres of Gaetano Donizetti's "Lucrezia Borgia" (1833), Donizetti's "Gemma di Vergy" (1834), Donizetti's "Maria Stuarda" (1835), Saverio Mercadante's "Il giuramento" (1837), Mercadante's "Il bravo" (1839), Giuseppe Verdi's "Oberto" (1839), Verdi's "Un giorno di regno" (1840), Donizetti's "Maria Padilla" (1841), Verdi's "Nabucco" (1842), Verdi's "I Lombardi alla prima crociata" (1843), Verdi's "Giovanna d'Arco" (1845), Federico Ricci's "Estella di Murcia" (1846), and Domenico Ronzani's "Salvator Rosa" (1854).
Antonietta Marini-Rainieri was an Italian operatic soprano active during the first half of the 19th century.
 She was married to lauded operatic bass Ignazio Marini and often appeared on stage with him.
 In 1835 she portrayed Giulietta opposite Amalia Schütz Oldosi as Romeo in the Teatro Regio di Parma's first staging of Vincenzo Bellini's "I Capuleti e i Montecchi".
 At La Scala she portrayed roles in the world premieres of Giuseppe Verdi's first two operas: Leonora in "Oberto" (1839) and the Marchesa del Poggio in "Un giorno di regno" (1840).
 She also appeared at that house as the Princess of Navarra in the premiere of Gaetano Donizetti's "Gianni di Parigi" (1839).
 In 1843 she sang the title role in the premiere of Giovanni Pacini's "Maria, regina d'Inghilterra" at the Teatro Carolino in Palermo.
 She reprised that role in December 1843 at La Scala and at the Teatro Carlo Felice in February 1844.
Agostino Rovere (1804, Monza - 1865, New York City) was an Italian operatic bass.
 After studying singing in Milan, he made his professional opera debut in 1826 at the opera house in Pavia.
 In 1828 he portrayed Clemente in the world premiere of Vincenzo Bellini's "Bianca e Fernando" at the Teatro Carlo Felice in Genoa.
 In 1839 he sang the role of Pedrigo in the world premiere of Gaetano Donizetti's "Gianni di Parigi" at La Scala.
 He returned to that opera house the following year to create the role of La Rocca in the world premiere of Giuseppe Verdi's "Un giorno di regno".
 In 1842 he portrayed the role of Marquis de Boisfleury in the world premiere of Donizetti's "Linda di Chamounix" at the Kärntnertortheater in Vienna.
 In 1847-1848 he was committed to the Royal Opera House in London where he sang Bartolo in Wolfgang Amadeus Mozart's "The Marriage of Figaro", Don Magnifico in Rossini's "La Cenerentola", Dulcamara in Donizetti's "L'elisir d'amore", Leporello in "Don Giovanni", and Mustafà in Gioachino Rossini's "L'italiana in Algeri"
Rita Rusic (born May 16, 1960), also known as Rita Cecchi Gori, is a Croatian producer, actress and singer.
 Rusic's career began as an actress with a major role in the 1982 film "Attila flagello di Dio".
 She was eventually moved into the film industry, with "Il pentito" in 1982.
 Later that year she also began filming "Joan Lui - Ma un giorno nel paese arrivo io di lunedì".
Semiramide (] ) is an opera in two acts by Gioachino Rossini.
Un giorno di regno, ossia Il finto Stanislao ("A One-Day Reign, or The Pretend Stanislaus", but often translated into English as "King for a Day") is an operatic "melodramma giocoso" in two acts by Giuseppe Verdi to an Italian libretto written in 1818 by Felice Romani.
L'ultimo giorno di Pompei ("The last day of Pompeii") is an opera ("dramma per musica") in two acts composed by Giovanni Pacini to an Italian libretto by Andrea Leone Tottola.
 It premiered to great success at the Teatro San Carlo in Naples on 19 November 1825 followed by productions in the major opera houses of Italy, Austria, France, and Portugal.
 When Pacini's popularity declined in the mid-19th century, the opera was all but forgotten until 1996 when it received its first performance in modern times at the Festival della Valle d'Itria in Martina Franca.
 "L'ultimo giorno di Pompei" influenced either directly or indirectly several other 19th-century works, most notably Karl Bryullov's 1833 painting, "The Last Day of Pompeii".
Ginger Costa-Jackson (born 10 September 1986, and named Ginger Emilia Jackson) is an Italian-American operatic mezzo-soprano and perennial artist with the Metropolitan Opera since entering its Lindemann Young Artist Development Program in 2007.
 The Met: Live in HD global broadcasts feature her frequently, as do other major theaters and concert venues worldwide.
 Costa-Jackson has performed in her native Italian, English, French, and Spanish, and speaks these languages fluently, along with limited German.
 While her signature role is "Carmen", Costa-Jackson is also a comedian, as in her Marchesa di Poggio (Glimmerglass Festival's 2013 adaptation of Verdi's "King for a Day /Un giorno di regno)", and also her 2009 Celia in Gilbert and Sullivan's "Iolanthe" with the San Francisco Symphony.
Francesca Comencini (born 19 August 1961) is an Italian film director and screenwriter.
 She attended the Lycée français Chateaubriand school with her sisters.
 She has directed 14 films since 1984.
 Her film "Le parole di mio padre" was screened in the Un Certain Regard section at the 2001 Cannes Film Festival.
 In 2012, her film "Un Giorno Speciale" was selected to compete for the Golden Lion at the 69th Venice International Film Festival.
Joan Lui (also known as "Joan Lui - Ma un giorno nel paese arrivo io di lunedì") is a 1985 Italian musical-comedy film written, directed and starred by Adriano Celentano.
 It is the last of the four films written and directed by Celentano.

Question: Do both Un giorno di regno and Semiramide contain two acts?
Answer: yes