How many movies have Jo Yoo-jin and Ko Won acted in together?

They have worked on 1 movie together! Their first movie together was Oligosaccharide The Movie (2017) and was their highest rated movie together. They have not worked together since Oligosaccharide The Movie (2017).

Role
Mi-jeong (Ep. 7: Oracle)
Role
Mi-jeong (Ep. 8: Perfect Husband)