★ 8.3 
Acting
ON
ON is best known for I-LAND. ON was born on December 14, 1999. ON is 26 years old (born December 14, 1999).
- Born
- December 14, 1999 (26 years old)
- Place of birth
- Seoul, South Korea
Biography
Choi Se-on (최세온; born December 14, 1999), known professionally as ON (온), is a South Korean singer-songwriter and producer under XX Entertainment. He is a member of the producing team CIELOGROOVE.
He is best known for participating in the reality survival shows Produce 101 Season 2 and I-LAND under the name Seon (세온).
He is best known for participating in the reality survival shows Produce 101 Season 2 and I-LAND under the name Seon (세온).
Known for
★ 8.3 Filmography
- 2020I-LANDSelf - Contestant
Frequently asked questions
What movies and shows has ON been in?
ON is best known for I-LAND.
When was ON born?
ON was born on December 14, 1999. (Seoul, South Korea)
How old is ON?
ON is 26 years old (born December 14, 1999).
Updated: October 26, 2026 ·