Ong Seongwu

Ong Seong-wu is one of those rare survival-show graduates who actually made you forget the show that launched him — which is saying something, because Produce 101 Season 2 was a phenomenon. He placed fifth out of about a hundred trainees, became part of Wanna One, and by the time that group disbanded in 2019 he'd already figured out exactly who he wanted to be next. His pivot to acting in At Eighteen was genuinely impressive: not the usual idol-trying-drama awkwardness, but something warm and considered. He went to Hanlim Multi Art School, the same training ground as half of K-pop royalty, and that pedigree shows — there's a craft behind the charisma. Before all of it he drummed in a school band and worked modeling side jobs after his first agency collapsed, and that detour shows in how hard he works. Quietly building, consistently surprising.

This take was written by generative AI, one per person, from publicly reported facts (editorial policy). It is a reading of the record, not reporting.

Name (English)

Ong Seongwu

Name (Japanese)

オン・ソンウ

Reading

おん・そんう

Born

August 25, 1995 (age 31)

Origin

Incheon, South Korea

Height

179 cm

Occupation

singer / actor

Zodiac / Chinese zodiac

Virgo / Boar

• Instagramhttps://www.instagram.com/osw_onge/
• Xhttps://x.com/officialtwt_OSW
• Wikipedia (English)https://en.wikipedia.org/wiki/Ong%20Seong-wu
• Wikipedia (Japanese)https://ja.wikipedia.org/wiki/%E3%82%AA%E3%83%B3%E3%83%BB%E3%82%BD%E3%83%B3%E3%82%A6
• Wikidatahttps://www.wikidata.org/wiki/Q30311753

Tags

• singer
• actor

Last updated

October 18, 2026

Only publicly available facts are listed; non-public or unconfirmed items are omitted. Base data was compiled from Wikidata from June 2026 onward; ages are recalculated daily and deaths are checked against Wikidata on an ongoing basis. English text is machine-assisted (facts translated by Sonnet, "My Take" written by Opus 4.8). The Japanese page is the source of record.