Jung Woo-sung (born March 20, 1973) is a South Korean actor and the first Korean UNHCR Goodwill Ambassador.

Jung started his career as a fashion model, rising to stardom and teenage cult status with the gangster movie Beat (1997), for which he won Best New Actor at the 17th Korean Association of Film Critics Awards.

Jung is also widely popular in other Asian countries, notably in Japan. He is a versatile actor known for playing leading roles in a wide spectrum of genres including high-grossing box office hits: Steel Rain (2017), The King (2017), Asura: The City of Madness (2016), The Divine Move (2014), Cold Eyes (2013); martial arts pic: Reign of Assassins (2010), fantasy: The Restless (2006); dramas; Don't Forget Me (2016), City of the Rising Sun (1999), erotic thriller Scarlet Innocence (2014); romantic movies: A Good Rain Knows (2009), Daisy (2006), A Moment to Remember (2004) and historical epic Musa (2001). His critically acclaimed film Innocent Witness (2019) won him Best Actor at the 40th Blue Dragon Film Awards and the Daesang (Grand Prize) for Film at the 55th Baeksang Arts Awards.

He is also an accomplished television actor. For his first major TV drama part in Asphalt Man (1995) he won Best New Actor at SBS Drama Awards and at the 32nd Baeksang Arts Awards (TV). His other prominent roles were in high-budget espionage TV series Athena: Goddess of War (2010) and the romantic drama Padam Padam (2011).