Kai (Born: Kim Jong In) is a member of the boy-band Exo. Known as the group's main dancer, Kai has been dancing since he was eight years old and was trained in jazz dance and ballet. Kai joined S.M. Entertainment after winning in the 10th S.M. Youth Best Contest in 2007, at thirteen years old. He was the first of twelve Exo members to be formally introduced to the public through teaser trailers. His first teaser was released on December 23, 2011.