June 9, 2012, July 21, 2012, July 6, 2013.

On April 8, 2012, the first mini album "MAMA" was released as a 12-member group and officially debuted. On June 3, 2013, the first regular album "XOXO (Kiss & Hug)" was released; in the same year, the first mini album "MAMA" was released. The title song "Growl", the follow-up to the first regular album, was selected as the best K-Pop music of 2013 by the US Billboard chart; the first winter album "December Miracle" was released on December 9.

On March 31, 2012, and April 1, 2012, EXO held showcases in Seoul, South Korea and Beijing, China respectively; on April 8, they officially debuted with the release of their mini album "MAMA", which sold out in just one month. exceeded 100,000; on May 20, the 12-member joint stage "MAMA" was publicly performed on TV for the first time after debuting through "Inkigayo".

On September 17, EXO won the Best Style Award at the 5th Mengniu Sour Yoghurt Music Chart Newcomer Ceremony; on November 30, at the Mnet Asian Music Awards Ceremony in Hong Kong, EXO won the Best Asian Award Newcomer Group Award.