The French/Portuguese coproduction is based on one of the most controversial novels by Witol Gombrowicz. The film is shot in French and produced by Leopardo Filmes and Alfama Films with Paulo Branco as the creative producer. The picture was shot in Sintra in November and December of 2014. The cast includes stars Jean-François Balmer, Sabine Azéma, Johan Libéreau and Jonathan Genet. Currently in post-production, the film is planned to premiere at Cannnes IFF. The final budget of the project has not yet been revealed.

Cosmos was originally set in the 1930s in Zakopane, Poland, but Żuławski decided to transfer it to Portugal and set it in Sintra, where most of the shoot took place. "Certain elements of Cosmos make this story obsessive and give it a mystic feel. The whole thing is in the style of a crime thriller." Żuławski told FNE. Cosmos is the first full feature film of 74-year-old Andrzej Żuławski since the film Fidelity, produced in 2000 by Branco and Gemini Films, France 3 Cinema and Canal+.