Jung Jae Young starred in the film noir No Blood No Tears (2002) and was a supporting actor in Sympathy for Mr. Vengeance (2002). Later, he won Best Supporting Actor at the Blue Dragon Film Awards for his role in the box office hit Shilmido (2003).
Further notable films were Someone Special in 2004 with Lee Na Young, and Welcome to Dongmakgol in 2005 where he again like in Shilmido played a “testosterone-driven, angst-filled soldier”.