Director Eric Gravel chose to color correct the Paris scenes so that it would look colder, to show that the city is hostile territory for Julie. Similarly, the palace scenes were supposed to show off different colors depending on the hotel rooms, but eventually, the colder color palette prevailed.
The story happens in parallel with a general strike, so that Julie's story mirrors that of the whole society. The idea comes from what Eric Gravel took away from the 1995 Paris strikes, where Parisians and people from the suburbs came together to help and support each other.
Laure Calamy underwent a one-day course at Le Bristol Paris hotel to understand the gestures and postures specific to the profession. Through her friend Tiziri Kandi, Calamy was given the opportunity to communicate with exploited chambermaids before filming. Kandi, who is a union leader for the Hôtels de Prestige et Économiques (HPE) division of the General Confederation of Labour (CGT), represented the striking chambermaids of the Ibis Batignolles hotel in Paris. Calamy questioned the striking maids about their physical health concerns, the hellish pace of their work and aspects of their personal lives.
Due to the first lockdown in France in mid-March 2020, preparations had to be halted first (for filming scheduled for April), and the film was again suspended due to the second lockdown a week after filming resumed in late October. Later, the film was completed on February 6, 2021.