Heechul got Leeteuk and Kangin to host his Sister's wedding and EunHae to perform for the couple with him.

Heejin's wedding looked like one big party thanks to her little brother.

kimheenim: I want to thank Lee Donghae and Lee Hyukjae who sang a congratulatory song at my noona’s wedding. And I want to thank Park Jungsoo and Kim Youngwoon as well for hosting so well. Members who were with us.. It is truly such a happy thing to have these friends even before they became my members. Kim Heejin. I called the expensive and busy kids for you so you have to really really live well with my brother-in-law. I believe you #SuperJunior #leeteuk #kangin #eunhyuk #donghae #gunhee #oppaoppa

gunheenim:Hosts : kangin,teuk congratulatory song : D&E cameo : kim heechul. There is no need for congratulatory songs to definitely be a ballad? ㅋㅋ#oppaoppa

Heechul also posted a really Sweet post for his sister on Instagram before the wedding. He made his Noona cry with his sweet awkwardness.

kimheenim: Today is the wedding day of Kim Heechul’s noona. I still haven’t met my brother-in-law yet but.. Since Kim Heechul’s noona is the complete opposite of me, ever since we were young she’s been very kind as thick as two short bricks.. Even though I always torment her everyday she always takes care of her dongsaeng.. Uhm. He must be a good brother-in-law. I hope he makes my noona happy. My one and only noona has married so I feel weird. Since I.. have not loved a girl to the point that I wanted to marry her.. Being at this age and doesn’t even know what love is is pitiful.. Sigh…. I need to reflect on myself. As the person from this body is living his up and down life like a child, you need to live your life with brother-in-law and your children happily and affectionately love each other. And don’t get hurt. I could not ever say these cheesy words through text or call. Live well Kim Heejin #Othersarecongratulatingforme #KimHeejin
Heejin commented on Heechul’s IG: I’m crying

kimheejin331: D-day… I’m getting married.. I never thought this day would come… It’s really just like a dream.. I love you my parents. And also my dongsaeng Kim Heechul.. Even though I can’t express my feelings well, I cherish you and I really love you. #KimHeechulmakingmecry
Heechul commented on Heejin’s IG: What kind of confidence do you have that you’re uploading selcas oftenㅡㅡ I’ll let you off this day since it’s your wedding dayㅡㅡ (cr)

LOL, Heenim teasing his noona on her wedding day..,

eunhyukee44:  the picture quality is like that because I took it from far away and zoomed in..such a modest looking heechul-hyungcongratulations to heejin-noona on your marriage!! Live happily for a long long time~ i wanted to make noona cry with the congratulatory song but it didnt work out well…Anyway congratulations!!#itsinyoungnoonanexttohim #andourdadandmom

cr: teukables