on february 22, 2012, chanyeol was officially introduced as one of the twelve members of the original formation of the south korean-chinese group exo. the group debuted on april 8 of the same year with the release of extended play "mama". in april 2012, he participated in the music video for the song "twinkle", debut single from the first sub-unit of girls 'generation,girls' generation-tts. in october 2013, chanyeol joined the cast of sbs's "law of the jungle" reality show during filming in micronesia. he also composed and recorded a soundtrack titled "last hunter" for the show.