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Ong Seong-wu (born August 25, 1995) is a South Korean singer and actor. He is known for his participation in the survival reality show Produce 101 Season 2, where he finished in fifth place, and is a former member of the show's derivative boy group Wanna One. Following Wanna One's disbandment, Ong made his acting debut with the drama At Eighteen (2019) directed by Shim Na-yeon. He also established his career as a solo artist with the release of his first extended play, Layers, on March 25, 2020.

Spooky in Love
as Kang Min-hwan

WANNA ONE GO: Back to Base

Boyfriend on Demand
as Bae Hyeon-woo

Love: Track
as Ki Hyeon-ha

Strong Girl Nam-soon
as Kang Hee-sik

20th Century Girl
as Joseph / Poong Joon-ho

Life Is Beautiful
as Park Jeong-woo

Seoul Vibe
as Joon-gi

Would You Like a Cup of Coffee?
as Kang Go-bi

More Than Friends
as Lee Soo

At Eighteen
as Choi Joon-Woo

Traveler
as Self

Wanna One 컴백 쇼 POWER OF DESTINY

Wanna One World Tour One: The World in Seoul
as Self

Star Road

Idol Room
as Self

Amazing Saturday
as Self

워너원 COMEBACK

COMEBACK WANNA ONE : Nothing Without You

Master Key
as Self

Wanna City
as Self

Wanna One Go
as Self

Idol Fever

Seongwoo is Alright
as Ong Seongwoo

Produce 101
as Self - Contestant

Men on a Mission
as Self

SNL Korea
as Self

Law of the Jungle

Running Man

You Hee-yeol's Sketchbook
as Self

Show! Music Core
as Host

Starlight Falls
as Choi Gyeong-su

Cattle Run
as Kang Jeong-hoon