Jung Jinwoon (born May 2, 1991) is the vocalist and main rapper for the South Korean boy band, 2AM. In January, 2009, Jinwoon was cast in MBC's reality show "Family Needed" Season III, also featuring NRG member Lee Sung-Jin and actors Choi Yangrak and Ricky Kim. NHe starred in 8eight's music video "잘가요 내사랑" ("Goodbye My Love") with Kim So Eun and Jung Gyeo-Woon, as well as singing in May Doni's song "몰라-ing" ("Don't Know-ing") with Jo Kwon on January 15, 2009. Seulong and Jinwoon make regular appearances as commentators for We Got Married Season II.
In January 2010, Jinwoon was diagnosed with an early case of H1N1, but recovered quickly before the illness took effect. He became part of the cast of "아이돌 막내반란시대" (Idol Maknae Rebellion) along with the other youngest members of fellow idol groups FT Island, U-Kiss, T-Max, Mighty Mouth and later MBLAQ. The first episode aired on November 7, 2009. He and Changmin featured on 8eight's 2010 mini-album This Bridge in the track "Star". --wiki