Jung Sun is born in South Korea and grew up in the Netherlands. At the age of 15 she started acting. After working in the Dutch theatre industry Jung Sun moved to London where she studied MA Acting at East15 Acting School. She works in both the Netherlands and the United Kingdom.

She portrayed Yoko Ono in Bed Peace: The Battle of Yohn and Joko at the Cockpit Theatre. Jung Sun was seen as the Ghost in series 2 of Killing Eve (BBC), as well as comedy series DEVS and Avenue 5.