SunHee Seo (Korean: 서선희; born in 1999 or 2000), known professionally as Ji-young Yoo (Korean: 유지영), is an American actress. She first appeared in the 2021 Netflix comedy-drama film Moxie, credited by her birth name.

In the same year, she adopted the stage name Ji-Young Yoo, which consists of Korean syllables that she believed would be easier for English speakers to pronounce. She also provided the voice of Zoey in the 2025 animated Netflix film KPop Demon Hunters.  In 2023, Yoo won the Best Performance in a U.