Cheon Seong-im (Hangul: 천성임; born August 15, 1981), better known by her stage name Song Ji-hyo (송지효), is a South Korean actress and model. She made her acting debut in Wishing Stairs (2003), one of Whispering Corridors film series. She then received further recognition for her roles in Princess Hours (2006), Jumong (2007), A Frozen Flower (2008), New World (2013), Emergency Couple (2014), and My Wife's Having an Affair this Week (2016).

Song is also known for being one of the members of the South Korean variety show Running Man.

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