Managed by Pledis Entertainment, he is a member of the South Korean boy band Seventeen and its subunit JxW.

[6][7] In 2015, Wonwoo debuted as a member of the South Korean boy group Seventeen with the extended play 17 Carat on May 29.

[13] In 2023, Wonwoo was featured in Dive Studio's Mindset series, releasing three episodes detailing his relationship with his mental health.

The album featured three tracks, including Wonwoo's first commercially released solo song "Leftover", where he is credited for songwriting.

[17] In June 2023, Wonwoo made his first appearance on the cover of Japanese fashion magazine Men's Non-no, alongside Seventeen member DK.

[23] In September 2023, Wonwoo attended British luxury fashion house Burberry's opening of their new pop-up store in Seoul.