Baekhyun was officially revealed to be Exo's ninth member on January 30, 2012 as a main vocalist of Exo.The group officially debuted in April 2012 and has since gained significant popularity and commercial success.
In February 2014, Baekhyun and fellow Exo member Suho became regular hosts for the SBS music television show Inkigayo. They left the position in November 2014 to focus on Exo's upcoming comeback.
In July 2014, Baekhyun made his musical theatre debut, playing the main role of Don Lockwood in the South Korean production of the musical Singin' in the Rain by SM C&C.