How many movies have François Hanss and Jérôme Devoise collaborated on?

They have worked on 4 movies together! Their first movie together was Mylène Farmer : Avant que l'ombre... à Bercy (2006) while their highest rated movie together was Mylène Farmer: 2019 - Le Film (2019). They have not worked together since Mylène Farmer: 2019 - Le Film (2019). They are most known for their music films together.