Seo Jeong-hoon is also known under the pseudonym 24. He is part of the record label The Black Label, a subsidiary of the South Korean entertainment company
YG Entertainment, which manages artists and groups such as
Blackpink,
BigBang, and
Jeon Somi. Jeong-hoon works as both a music producer and songwriter. In 2023, he was promoted to a full member of the
Korea Music Copyright Association. Seo Jeong-hoon contributed as a songwriter and producer to several tracks on the soundtrack of the film
KPop Demon Hunters (2025), including the
Academy Award-winning song
Golden. At the
Grammy Awards 2026, he made history by delivering an acceptance speech in both
English and
Korean, thanking his mentor, rapper
Teddy Park, as a pioneer of
K-pop. He and his songwriting team received the award for
Best Song Written for Visual Media, which he accepted on their behalf. This marked the first Grammy win for a K-pop song. He also received a
Golden Globe Award for the song. == Discography (selected) ==