Stephen Yoon, professionally known by his Korean name Yoon Keeho (KOR: 윤기호), or just Keeho (KOR: 기호), is a Korean-Canadian singer under FNC Entertainment. He is the leader and a vocalist in K-Pop boy group P1Harmony, whom debuted in October 2020.

Born Sepetmber 27, 2001, in Toronto, Ontario, Canada, Keeho grew up in Markham, Ontario, attending Unionville High School’s arts program before going to South Korea to become a K-Pop idol. As an artist, Keeho has contributed to composing popular P1Harmony B-side tracks, such as “이거지 (That’s It)” and “Follow Me”, among others. Outside of music, Keeho is well known in the K-Pop fan community for being a “relatable Generation-Z K-Pop idol,” given his Canadian upbringing, commonly making English jokes with fans in online platforms and calling them his “besties.”

Keeho’s younger brother, Timothy Yoon, is also a K-Pop idol, having debuted in 82MAJOR three years after him in 2023.