Jang Do Yoon, known as Do Yoon, is a South Korean singer, model, and actor. He was previously known to be a trainee of Pledis Entertainment's boy group "Seventeen", but decided to pursue a career in acting instead. He appeared in After School Blue’s ‘Wonder Boy’ MV; Happy Pledis ‘Love Letter’ MV; NU’EST’s ‘Face’ MV; Hello Venus’s ‘Venus’ MV.
