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 "Lee Tae-min"): Lee Tae-min (born July 18, 1993), better known by the mononym Taemin, is a South Korean singer and actor.
Relevant evidence: Yes