Joo Won debuted as a musical theater actor in 2007 through a comedy musical titled “Altar Boyz.” His first appearance on the small screen came in 2010 through the KBS drama series "Bread, Love and Dreams." For his performance, Joo Won was awarded 'Best New Actor' Award during the annual KBS Drama Awards. He soon after made his first appearance on the silver screen as well through a movie titled "Fashion King," in 2014. He is best known for his performances in KBS drama series “Bridal Mask,” in 2012 and SBS drama series "Yong-pal," in 2015. Joo Won was also part of a team on Season 2 of the local variety show "2 Days & 1 Night" for about seven months in 2010.