L'Arc-en-Ciel (ラルク アン シエル, Raruku an Shieru, "The Rainbow" in French), usually stylized as "L'Arc~en~Ciel", is a Japanese rock band that formed in 1991. The group has sold over 13 million albums, 16 million singles, and millions of other units, including videos.They were ranked at number 58 on a list of Top 100 Japanese pop musicians, provided by HMV Japan in 2003, and are among the most influential artists in the Japanese music scene.

Members of L'Arc-en-Ciel:
 Hyde - vocals (1991-present)
Birthday: January 29
Hyde joined L'Arc~en~Ciel in 1991 after leaving the band Jerusalem's Rod where he was the guitarist. In addition to being the lead singer and main lyricist of L'Arc~en~Ciel, Hyde has released 4 solo albums and 8 singles, as well as started his own independent record label called VAMPROSE.

Tetsuya - bass, backing vocals (1991-present)
Birthday: October 3
Tetsuya is the leader and bassist of the Japanese rock band L'Arc-en-Ciel. He also does backup vocals and has composed many of the band's songs, including "Link", "Ready Steady Go", "Finale", "Driver's High", "Stay Away", and "Pieces". In the band, he went by the nickname tetsu, until December 1, 2009, when he started to use his birth name stylized as tetsuya. Since 2001, his solo work was released under the name TETSU69 (69 is his birth year). On November 26, 2006, he released one song under the name tetsu, and on December 1, 2009, he switched to TETSUYA to mirror the switch he made as a member of L'Arc-en-Ciel. In 2007, he married 22-year-old actress Ayana Sakai.

Ken - guitar (1992-present)
Birthday: November 28
Ken is the guitarist of Japanese rock band L'Arc-en-Ciel. He is also the leader/guitarist/vocalist of the band, Sons Of All Pussys (also known as S.O.A.P) and has released a solo album entitled In Physical.

Yukihiro - drums (1998-present)
Birthday: November 24
Yukihiro (stylized as yukihiro) is the drummer and remixer of the Japanese rock band L'Arc-en-Ciel as well as the leader of Acid Android. His nickname is "Yuki"(or "Yukkie") as well as "teacher".


source: http://en.wikipedia.org