The opening scene takes place in hotel "les belles rives" in Juan les Pins, F. Scott Fitzgerald was a resident there with his wife in the 1920s. This resonates quite well with the grandiloquent and bohemian lifestyle of the two main characters
The castle is not located in Spain but in Mandelieu next to Cannes in France.
Interviewed by a Belgian magazine, Virginie Efira talked about the difficulty of taking off all their clothes in front of the camera. In particular, the actress spoke of the scene in which she is seen strolling down the street wearing only a hat on her head and high heels. "In the other films, it's usually love scenes. Already, I'm not the only one who's naked, so you share your feelings of modesty with the other person, who's in a bad way too," she explains. "I thought I was going to faint, when I had to walk around naked, with my little hat on my head and heels, to go shopping, I'd say to myself I thought: 'What kind of job am I doing?"
Filming was completed just four days before France's first national COVID-19 lockdown, narrowly avoiding getting shut down for months.