How many movies have Gillian Chung and William Chan Wai-Ting acted in together?

They have worked on 3 movies together! Their first movie together was Ex (2010) while their highest rated movie together was 英皇娱乐15周年群星演唱会 (2015). They have not worked together since I Love That Crazy Little Thing (2016). They are most known for their romance films together.