Bon Jovi granted the rights to use their song "Living on a Prayer" when they learned that Olivia Colman would be singing it in the film.
Maggie Gyllenhaal said Elena Ferrante (the author of the source novel) only approved of the film's adaptation if it would be directed by a woman.
Maggie Gyllenhaal acquired the rights to Elena Ferrante's novel in 2018. She wrote a heartfelt letter to Ferrante (no one actually knows who the author is or indeed if she is a female), only for Ferrante to grant her the rights through an open letter in the UK newspaper, The Guardian, but only under the proviso that Gyllenhaal direct the film herself.