Hwang In-yub began his entertainment career as a model in 2017. He made his acting debut the following year through the Naver TV web series Why. In 2019, he landed his first television role in the KBS2 sageuk Tale of Nokdu. In 2020, he played a supporting character in JTBC’s Eighteen Again, which was based on the 2009 American fantasy comedy film 17 Again. In 2021, he became part of the main cast of the hit webtoon-based tvN romantic comedy True Beauty. That same year, he was named Best Male Rookie Actor at the Brand Customer Loyalty Awards.

Hwang In-yub fulfilled his mandatory military service prior to his entertainment industry debut. He lived in Davao City, Philippines for several years. He majored in fashion design at the Philippine Women’s College of Davao. His English name is Ryan Leon.