※ This list starts from the beginning of SM Entertainment.
※ There's no hidden agenda, I'm just curious.
※ I tried my best to find photos from their active years.
※ Organized by activity name (period when they were the youngest in SM, debut age).
※ If anyone is missing, let me know in the comments, and I'll correct it immediately.
※ It's not about group youngest members, but SM's overall youngest artists at the time.
※ I wrote their official age (international age)
H.O.T Lee Jaewon
From 1996.09.07 to 1997.11.27
Debuted at the age of 16
S.E.S Shoo
From 1997.11.28 to 1999.11.20
Debuted at the age of 16
Fly to the Sky Hwanhee
From 1999.11.21 to 2000.08.24
Debuted at the age of 17
BoA
From 2000.08.25 to 2003.12.25
Debuted at the age of 13
TVXQ Max Changmin
From 2003.12.26 to 2006.09.07
Debuted at the age of 15
Zhang Liyin
From 2006.09.08 to 2007.08.04
Debuted at the age of 17
SNSD Seohyun
From 2007.08.05 to 2008.05.24
Debuted at the age of 16
SHINee Taemin
From 2008.05.25 to 2009.09.24
Debuted at the age of 14
f(x) Krystal
From 2009.09.05 to 2014.07.31
Debuted at the age of 14
Red Velvet Joy
From 2014.08.01to 2015.03.10
Debuted at the age of 17
Red Velvet Yeri
From 2015.03.11 to 2016.04.08
Debuted at the age of 16
NCT127, NCT Dream Mark
From 2016.04.09 to 2016.07.08
Debuted at the age of 16
NCT 127, NCT Dream Haechan
From 2016.07.07 to 2016.08.24
Debuted at the age of 16
NCT Dream Jisung
From 2016.08.25 to 2020.11.16
Debuted at the age of 14
Aespa Ning Ning
From 2020.11.17 to 2023.09.03
Debuted at the age of 18
RIIZE Anton
From 2023.09.04 to 2024.02.20
Debuted at the age of 19
NCT Wish Sakuya
From 2024.02.21 to 2025.02.23
Debuted at the age of 16
Hearts 2 Hearts Nayeon
From 2025.02.25~
Debut at the age of 14
-Kyuhyun and Sehun aren't on here...
ㄴKyuhyun was the same age as Changmin at the time. But since Changmin's birthday is later, Kyuhyun wasn't the youngest in SM overall!
-Jisung seemed like the maknae for a long time. But he's actually the same age as Ning Ning, so that's probably why it feels that wayㅋㅋㅋㅋ
-How old was Sehun when he debuted?
ㄴSehun was born in 1994, so he's the same age as Krystal. He debuted when he was in 11th grade.
-BoA debuted as a solo artist when she was so young, and her skills were amazing from the start. It's amazing.
-Krystal was the maknae for a really long timeㄷㄷㄷ
-Anton and Krystal looked so young for their ageㅋㅋㅋ
-It's amazing that BoA debuted in Korea at such a young age and then in Japan at 14.
-I thought BoA debuted at a much younger age, but she actually debuted at 13, which is only one year older than Taemin's age when he debuted.
-I didn't know Chanyoung-ie used to be the maknae in SM too...
-I didn't know this when I was young, but debuting at 13 or 14 was really young....
-I was shocked when I first saw Sakuya, I thought he was an elementary school studentㅋㅋㅋㅋ
-I didn’t know Krystal was younger than Sulli…
-Jisung feels like the eternal maknae to me, so I thought he was the maknae in SM for the longest time, but it turns out that Krystal was the maknae for a logner time.
-I didn't know Krystal debuted at 14. Unbelievable.
-Soojung-ie and Jisung-ie, whoaㅋㅋ They were really young when they debuted. Especially Jisung... He still feels like the maknae to me. I still remember how shocked I was when I first saw him debuting.
-Where are EXO and Super Junior on the list?
ㄴThis is about the youngest artists in the entire company, not just in their groups.
-Some members look younger than their age, and there are some who debuted younger than I thought.
