Stage Name: Joon
Nickname: Honey Abs
Birthday: February 7, 1988
Position: Vocalist, Main Dancer, and Face of The Group
Height: 180 cm
Weight: 65 kg
-It was confirmed on January 5, 2012, that Joon would join the cast the We Got Married spin-off 'Pit-a-pat shake'. He was paired with After School's Lizzy.
-He appeared in HyunA's MV for "Bubble Pop"
- He knows how to dance ballet
- His nickname derives from his toned, sexy, sleek, delicious looking abs
- Although he has a buff body, he is playfully shy about showing his skin sometimes
- He knows English well, but his pronunciation is very adorable yet bad
- Can sometimes be made fun of for being a “babo” (fool)
-In 2012 he was paired with actress Oh Yeon Seo to be his wife on the TV show We Got Married
-He's a member of the one time sub unit Dynamic BLACK with 2AM's Jinwoon, B2ST's Gikwang, TEEN TOP's L.Joe, & Infinite's Hoya
Before becoming a part of MBLAQ, Lee Joon acted in CFs, had a small non-recurring role in the first episode of Korean sitcom That Person is Coming (그분이 오신다), which aired in 2008, and began and completed filming for the 2009 film, Ninja Assassin in which he portrayed the Teenage Raizo.