Hwang In-youp (Korean: 황인엽; born on January 19, 1991) is a South Korean actor, singer, and model. He is best known for his roles in the television dramas The Tale of Nokdu (2019), 18 Again (2020), and True Beauty (2020–21). Hwang entered the entertainment industry in 2017 as a runway model. In 2018, he made his acting debut in the Naver TV web series Why. He later signed a contract with the South Korean agency KeyEast, a subsidiary of SM Entertainment. In 2019, he played Seo Kyo-won in the web series Freshman, and Park Dan-ho in the KBS2 historical television series The Tale of Nokdu. In 2020, Hwang gained recognition for his performance in the JTBC fantasy series 18 Again, a remake of the 2009 American film 17 Again. He played Goo Ja-sung, a school bully and the counterpart character of Stan, portrayed by Hunter Parrish in the original film. Hwang rose to international prominence for his role in the 2020-21 TVN romantic-comedy series True Beauty, based on the on-going Webtoon of the same name. He portrayed Han Seo-jun, a secondary lead character. He also made his singing debut with the song "It Starts Today" (오늘부터 시작인걸), an original television soundtrack for the series.