EXO (엑소) is a nine-member boy group under SM Entertainment. They debuted on April 8, 2012 with their first mini album, Mama.
The group originally consisted of twelve members; Xiumin, Luhan, Kris, Suho, Lay, Baekhyun, Chen, Chanyeol, D.O., Tao, Kai and Sehun, who were divided into two sub-units, EXO-K and EXO-M, one promoting in Korean and the other in Mandarin. Between 2014 and 2015, the group lost three of its members: Kris, Luhan and Tao, respectively, preferring to focus on their individual careers in China.
In 2016, the first official sub-unit EXO-CBX, consisting of Chen, Baekhyun, and Xiumin, debuted with the mini album Hey Mama!. In 2019, their second official sub-unit called EXO-SC, consisting of Sehun and Chanyeol, debuted with the mini album What a Life.