Choi Sung-kook (; born 2 December 1970) is a South Korean actor.
Choi developed an interest in acting from a young age. He studied drama at Seoul University of Arts in the 1990s and launched his career in 1995.
In September 2022, Choi's agency announced that Choi was dating a non-celebrity girlfriend who was 24 years younger than him. They married on November 5 in Seoul. On May 15, 2023, Choi confirmed his wife was pregnant. His wife gave birth to a son on September 23, 2023.