EXO’s Chen was seen at his older brother Kim Jongdeok’s wedding on October 27.

Chen sang the song, “Best Luck”, which was a 2014 OST from the drama It’s Okay, That’s Love.

Before the performance, Chen gave a short speech to the audience.

I’m sorry but I’ll just say one thing…Oh my goodness. I can’t believe that my brother is getting married. I was more nervous seeing him enter the hall. I want to thank everyone once again for coming today. My brother wanted to hear this song, so I will be singing ‘Best Luck’. Please enjoy along with the couple! — EXO’s Chen

The keyword 결혼축하 (congratulations on your wedding) became trending in Korea on Twitter as fans congratulated Chen’s brother on his marriage.

Videos and photos from the wedding have flooded Twitter from fans and guests from the wedding.

종덕님 결혼 진심으로 축하드려요

💑💑💑💑💑💑💑

🤴🤴🤴🤴🤴🤴🤴

형님이 듣고싶어 하시던

친동생의 노래로

결혼축하곡 선물받기 pic.twitter.com/TZvDPM7YRD — 미니세니마망*'×'* (@An_Cm_Es) October 27, 2019

ㅠㅠㅠㅠㅠ 깅종댕 오늘도 여전히 기엽고 예쁘고 다하네 ㅜㅜㅠㅠㅠㅠㅠㅠㅠㅠ 종덕이 형님 결혼축하드립니다 ㅋㅋ큐ㅠㅜㅜㅜ pic.twitter.com/gbB6IwxBQf — 룡즈⚡️ (@_chen21) October 27, 2019

Take a look at Chen’s performance below!

Congrats to the married couple!