Gianna Jun
- Born
- 30 October 1981 (44 years)
- Place of birth
- Seoul, South Korea
- Gender
- Female
Jun Ji-hyun (born October 30, 1981) also known as Gianna Jun, is a South Korean actress and model. She had her breakthrough role in 2001 as The Girl in the film My Sassy Girl which became the highest grossing Korean comedy of all time. Other notable films include Il Mare (2000), The Thieves (2012), and Assassination (2015).
