Kim Sang-eun (Korean: 김상은; born August 6, 1978), known professionally as Lee Ji-ah, is a South Korean actress. She rose to fame with her role in the television drama The Legend (2007), and has since further participated in Beethoven Virus (2008), Athena: Goddess of War (2010), Me Too, Flower! (2011), Thrice Married Woman (2013), My Mister (2018), and The Penthouse: War in Life (2020–2021).