SEE ALSO: Yoon Eun Hye amps up the nostalgia as she recreates her ‘Princess Hours’ character

Before airing the BTS episode of 'Knowing Brothers', Heechul posted a selfie with himself and Suga. The caption reads, "My little brother Suga whom I met through 'Weekly Idol', it's already been 2 years since then...time goes by really fast. Before filming the first episode of 'Weekly Idol', I was told BTS would be appearing so I decided to look them up and while doing so, I became a fan ('Dope' MV was really dope and 'I NEED U' smashed my sensitivity). Also, I heard Suga and Heechul's chemistry was unreal today. You can check out the chemistry today through 'Knowing Brothers'."

Don't miss out on the two artists' chemistry on 'Knowing Brothers'!

<?? ???>? ??? ?? ?? ?? ????? 2? ?.... ?? ? ??? <?? ???> ? ?? ? '?????' ???? ????? ???? ?? ? ?? ??? ?? ???? ? ????? ?? ???(?? ?? ?? ??. ? ?? ????? I NEED U ???)??? ?? ??? ??? ??? ???? ???????? ??? ??? ? ????? ??? ??!! ?? ?? JTBC <?? ??>?? ???? ? ?????? #??? #?????????? #???? #????? #?? #DNA

A post shared by Kim Hee Chul (@kimheenim) on Sep 22, 2017 at 7:58pm PDT