Jeon Jung-kook (전정국; born September 1, 1997), known mononymously as Jung Kook (정국), is a South Korean singer, songwriter and record producer under BigHit Music. He is the maknae of the boy group BTS.

Jung Kook has performed three solo songs as part of BTS' discography —"Begin" in 2016, "Euphoria" in 2018, and "My Time" in 2020— all of which charted on South Korea's Gaon Digital Chart. He released two self-produced digital singles, "Still With You" in 2020 and "My You" in 2022. Jung Kook also recorded the soundtrack song "Stay Alive" for the BTS-based webtoon 7Fates: Chakho. In 2022, he featured on American singer-songwriter Charlie Puth's single "Left and Right", which peaked at number 22 on the US Billboard Hot 100. Later that year, he became the first South Korean artist to release an official song for the FIFA World Cup soundtrack with "Dreamers", which he subsequently performed at the 2022 FIFA World Cup Opening Ceremony.

In 2023, Jung Kook released his debut solo single "Seven" featuring Latto, which simultaneously debuted at number one on the Billboard Hot 100, the Global 200, and the Global Excl. US charts, making him the first Korean solo artist to do so. It also became the fastest song in Spotify history to surpass 100 million streams on the platform. His follow-up single "3D" featuring Jack Harlow reached the top five of the Billboard Hot 100 and made Jung Kook the first South Korean solo artist to achieve two consecutive top-five entries on the UK Singles Chart. In 2024, Jung Kook was promoted to full member of the Korea Music Copyright Association.

In 2018, he was awarded the fifth-class Hwagwan Order of Cultural Merit by the President of South Korea, along with the other members of BTS, for his contributions to Korean culture.