Jung Yong-jun, better known as Jang Hyuk, is a South Korean actor. He is best known for his leading roles in the films Volcano High (2001), Windstruck (2004), The Flu (2013), as well as the television series Successful Story of a Bright Girl (2002), Thank You (2007), The Slave Hunters (2010), Deep Rooted Tree (2011), You Are My Destiny (2014), Voice (2017), Money Flower (2017–18), and Bloody Heart (2022).