The entire group are born on 90s , so their average age is pertty young ~ 

hongki - 2 March 1990 , Jonghoon - 7 March 1990 , Jaejin - 17 Dis 1991 , Seunghyun - 21 Aug 1992 ,Minhwan - 11 Nov 1992

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yes really pretty :) hahha