Title: Iris (TV series)
Content:  The IRIS original soundtrack was released as a 16-track album on November 13, 2009, with music composed by Yi Dong-jun and Choe Seong-gwon. The soundtrack contained a number of the vocal themes used in the series, including those by Baek Ji-young, Shin Seung-hun, and Big Bang. On December 24, a limited edition was released as a two-disc set with a 76-page photobook. The first disc contained ten vocal themes, four of which were used in the second half of the series and not included on the original release. The second disc collected fifteen instrumentals used as backdrops during the show's run, including four not on the previous collection. In the week preceding the premiere of Iris on Japanese television, it was announced that 
Title: Iris ter Schiphorst
Content:  Iris ter Schiphorst (born 22 May 1956) is a German composer and musician.
Title: Iris Szeghy
Content:  Iris Szeghy (born 1956) is a Slovak composer living in Switzerland.
Title: Iris (Cirque du Soleil)
Content: 1) Buster's Big Opening ; 2) The Twins (Aerial straps) ; 3) Kiriki Film (Kiriki intro) ; 4) Kiriki ; 5) Silent Movie ; 6) Patterns (Hand to hand) ; 7) Clown Special Effects ; 8) Pellicule - Part I and II (Film strip scene) ; 9) Snake Women (Contortion) ; 10) Movie Studio (Movie studio scene) ; 11) The Broom (Solo trapeze intro) ; 12) Flying Scarlett (Solo trapeze) ; 13) Old Toys ; 14) Film Noir / Pursuit (Film noir scene) ; 15) Rooftops (Trampolines) ; 16) Scarlett Balancing (Hand balancing on canes) ; 17) Iris Finale and Bows Iris' soundtrack was created by Danny Elfman. The music is created by pre-recorded music from a blend of 100 orchestral musicians (the largest in Cirque du Soleil's history) spread over both large and small ensembles, mixed with the show's eight live, in-house musicians. Below are the 17 track titles from the official soundtrack album, which was originally released in 2011. The italicized items are the acts associated with the adjacent tracks. 
Title: Iris (Cirque du Soleil)
Content: Buster: a composer in search of true love. ; Scarlett: a naïve actress who longs to be a movie star. The Iris troupe consists of 72 performers, including Olympic athletes. Principal characters include:
Title: Iris (American band)
Content:  Iris was an American synthpop band, formed by Reagan Jones and Mat Morris in 1993. After the release of their first album Disconnect, Matthew Morris was replaced with Andrew Sega, who pushed the band's sound in a more experimental electronic direction. Their final album, Six, was released in September 2019. Iris disbanded in 2021.
Title: Iiris
Content:  Iiris Vesik (born 16 July 1991), better known as simply Iiris, is an Estonian singer, songwriter, and stage actress. Her debut album The Magic Gift Box was released in March 2012 under EMI Music Finland. She's also the singer of the group Night Tapes.
Title: Iris (Japanese band)
Content:  Iris (stylized as i☆Ris) is a Japanese voice acting and singing female idol group, formed in 2012 by Avex. The group currently consists of five members: Saki Yamakita, Yu Serizawa, Himika Akaneya, Yūki Wakai, and Miyu Kubota. The leader is Saki Yamakita. It was labeled a "hybrid group", because of the members' work as voice actresses in addition to performing as singing idols. They provide the voices for main characters in the arcade game and anime franchise PriPara. The group has also performed themes for the anime series Magical Girl Site and Twin Star Exorcists.
Title: Iris (Romanian band)
Content:  Iris is a Romanian rock band established in February 1977 by Ioan 'Nelu' Dumitrescu (drums), Ion 'Nuțu' Olteanu (lead solo guitar and vocals) and Emil Lechințeanu (bass guitar). They achieved success, followed by tours throughout Romania and recordings for radio broadcast. At the 2006 MTV Romania Music Awards, Iris won the Best Rock Award and were nominated for Best Band and Best Live Act.
Title: Iiris
Content:  Iceland Airwaves (Iceland) followed soon. At the beginning of 2011 Iiris became the artist of the week on MTV Iggy’s blog – “A depressingly few amount of bands have “it.” In fact, I’m pretty sure I didn’t know what “it” was, until I listened to Estonian singer/songwriter/pianist Iiris. Because whatever “it” is, she definitely has it. Iiris has the eclecticism, the smarts, the innovation, the pop sound, not to mention the adorable/pretty image to become a huge mega mega, mega star.” Iiris was signed to EMI Finland in June 2011. Her debut album The Magic Gift Box, produced by Ago Teppand (a.k.a. Sethh), was released on 28 March 2012. Iiris is often compared to Estonian pop singer Kerli, and they are both fans of each other. After Universal Music Group bought EMI, Iiris has been releasing her songs on Universal Music Finland.

Question: Who was the composer of Iris?
Answer: Pietro Mascagni.