Park Yoo-chun, formerly known as Micky Yoochun and better known by the mononym Yoochun, is a Korean-American singer-songwriter and actor. He is a former member of the South Korean boy bands JYJ and TVXQ. He has starred in dramas Sungkyunkwan Scandal (2010), Miss Ripley (2011), Rooftop Prince (2012), Missing You (2012), Three Days (2014) and A Girl Who Sees Smells (2015).

JYJ is a South Korean boy band formed in 2010 by Kim Junsu, Kim Jae-joong, and Park Yoo-chun, the three former members of TVXQ. Their group name is taken from the initial letters of each member's names. The group was formerly managed by C-JeS Entertainment in Korea.