Im Siwan, better known by his stage name Siwan, is a South Korean singer and actor. Born on December 1, 1988, he is a member of the nine-member boy band ZE:A, which debuted in 2010. Im Siwan crossed over into acting and received critical acclaim for his roles in the television dramas "Triangle" (2014) and "Incomplete Life (aka Misaeng)" (2014).