Lim Dong-hyun (born April 11, 1995), known professionally as Lee Do-hyun, is a South Korean actor. He first gained recognition for his supporting role in Hotel del Luna (2019), and went on to star in the television series 18 Again (2020), Sweet Home (2020–2024), Youth of May (2021), The Glory (2022–2023), and The Good Bad Mother (2023), as well as the film Exhuma (2024).