Hwang In-youp is a South Korean actor, model, and singer. He began his career in modeling industry before making his screen debut with a main role in the web series Why (2018). He rose to international prominence through his breakthrough role in hit drama True Beauty (2020–21). He is also known for his role in the Netflix original series The Sound of Magic (2022) and his leading role in the television drama Why Her (2022).

Why Her is a 2022 South Korean television series directed by Park Soo-jin. Starring Seo Hyun-jin in the title role of Oh Soo-jae, and features Hwang In-youp, Huh Joon-ho in pivotal roles, also Bae In-hyuk appears in the series. It premiered on SBS TV on June 3, 2022, and aired every Friday and Saturday at 22:00 (KST) till July 23. It is also available for streaming on Viu in selected regions.