How many movies have Han Seung-do and Ko Chang-seok acted in together?

They have worked on 2 movies together! Their first movie together was Secret Reunion (2010) while their highest rated movie together was The Front Line (2011). They have not worked together since The Front Line (2011).

Role
Pohang Company Commander (uncredited)
Role
Yang Hyo-sam
Role
Hallway Fighting Agent 1
Role
Vietnam Boss