At the same time, another group of demonstrators from the collective began a second protest on the ground.
They held a sign with the same message and began chanting and blowing whistles to draw attention.
There were around a dozen protesters on the roof and a dozen more on the ground.
Protesters scale the Palais at the Cannes Film Festival on TuesdayNada Aboul Kheir/Deadline
you might see footage from the dramatic tug between the protesters and police below.
Its still unclear whether a strike will take place.
The workers anger stems from two intertwined issues.
Secondly, they want to be officially classed as temporary entertainment workers, known asintermittents du spectaclein France.
TheCannes Film Festivalruns through May 25.