Bong Jae-hyun (Korean: 봉재현; born January 4, 1999), known mononymously as Jaehyun, is a South Korean singer, actor and known for his work as a member of boy group Golden Child. As an actor, he is best known for his roles in Twinkling Watermelon (2023) and High School Return of a Gangster (2024).

Jaehyun was born on January 4, 1999, Gangbuk District, Seoul, South Korea. He attended Hanlim Multi Art School.

He made his debut as a member of Golden Child in the reality series Woollim Pick in 2017. Later, he officially debuted with his group release of the first EP 'Gol-Cha!' on August 28, 2017.^{[unreliable source?]}

Jaehyun was appeared in the first episode of Dingo web drama Convenience Store Fling on January 23, 2021, marking his acting debut.

On April 6, 2023, Jaehyun was confirmed to cast members on web drama High School Return of a Gangster scheduled to premiere in 2024. Later that months, he made his screen debut in horror film Urban Myths premiered on April 27.

On August 22, 2023, Jaehyun was confirmed to cast as Eunho in the drama Twinkling Watermelon, which aired on September 25.