From Wikipedia:

Super Junior (Korean: 슈퍼주니어; Syupeo Junieo) is a popular South Korean idol group. Formed in 2005 by producer Lee Soo-man of SM Entertainment, the group comprised a total of thirteen members at its peak. Super Junior originally debuted with twelve members, consisting of leader Leeteuk, Heechul, Han Geng, Yesung, Kangin, Shindong, Sungmin, Eunhyuk, Siwon, Donghae, Ryeowook and Kibum. Kyuhyun joined the group in 2006.

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