“Lux Aeterna,” the film’s signature song, has become so distinctive that it actually pops up in trailers for other films, as though the music itself is as canonical as “Clair de Lune.

Film has been important to Vaccarello for some ... Noë and Saint Laurent went on to partner on the short Lux Aeterna that debuted in Cannes in 2022, pre-dating the production company.