Question: Onew, Jonghyun, Key and Minho had a fifth member of their South Korean boy group that was formed in 2008. This member also began his acting career in 2009 in an MBC comedy. Who is he?
Sentence (from "Leo (singer)"): Known for his high-pitched, sharp, and clear vocals, Leo debuted as a member of the South Korean boy group VIXX in May 2012, and began his acting career in 2014 in the musical "Full House" as Lee Young-jae.
Relevant evidence: No