Average Age of Boy Group When Debut

H.O.T

Debut in 1996 with average age 17.4

Moon Hee Jun, Tony An, Jang Woo Hyuk : 18 years old

Kangta : 17 years old;  Lee Jae Won : 16 years old

Shinhwa

Debut in 1998 with average age 18.5

Eric Moon, Lee Min Woo, Kim Dong Wan, Shin Hye Sung : 19 years old

JunJin : 18 years old;  Andy : 17 years old

DBSK

Debut in 2004 with average age 17.4

U-Know Yunho, Hero Jaejoong, Micky Yoochun : 18 years old

Xiah Junsu : 17 years old;  Max Changmin : 16 years old

SS501

Debut in 2005 with average age 18.4

Kim Hyun Joong, Heo Young Saeng : 19 years old

Kim Kyu Jong, Park Jung Min, Kim Hyung Joon : 18 years old

Super Junior

Debut in 2005 with average age 19.5

Leeteuk, Kim Heechul : 22 years old; Hankyung, Yesung : 21 years old

Kangin, Shindong : 20 years old; Sungmin, Donghae, Eunhyuk : 19 years old

Ryeowook, Kibum, Siwon : 18 years old; Kyuhyun : 17 years old

Big Bang

Debut in 2006 with average age 17.6

TOP : 19 years old; Taeyang, G-Dragon : 18 years old

Daesung : 17 years old; Seungri : 16 years old

2PM

Debut in 2008 with average age 19.1

Junsu, Taecyeon, Nichkhun : 20 years old

Wooyoung : 19 years old; Junho, Chansung : 18 years old

SHINee

Debut in 2008 with average age 17.2

Onew : 19 years old; Jonghyun : 18 years old

KEY, Minho : 17 years old; Taemin : 15 years old

BEAST

Debut in 2009 with average age 19.3

DooJoon, HyunSeung, JunHyung : 20 years old

YoSeob, KiKwang : 19 years old; DongWoon : 18 years old

MBLAQ

Debut in 2009 with average age 20.4

Seungho, G.O : 22 years old; Lee Joon : 21 years old

CheonDoong : 19 years old; Mir : 18 years old

Infinite

Debut in 2010 with average age 19

Kim SungGyu : 21 years old; Jang DongWoo : 20 years old

Nam WooHyun, HoWon, Lee SeongYeol : 19 years old; L : 18 years old

Lee SungJong : 17 years old

TEEN TOP

Debut in 2010 with average age 16.3

C.A.P : 18 years old; Chunji, L.Joe : 17 years old

Niel : 16 years old; Ricky, ChangJo : 15 years old

credit: NATE