Tenma replaced Ranjith's regular, Santhosh Narayanan, as the music composer for the film.

[5] Transgender actress Sherin Celin Mathew, who played Sylvia in the film, died by suicide on 17 May 2022 in Kochi.

[9] M Suganth of The Times of India rated the film with 3.5/5 stars stating, "Several blending of forms like love, caste, honour killings and music, actually gives the film a vibe that is very new-age, and makes it an experience that shouldn't be missed".

[10] Krishna Selvaseelan of Tamil Guardian rated the film 4 out of 5 stars, writing, “‘NN’ is the first chapter of the New Testament for the portrayal of love in Tamil cinema.

Pa Ranjith has only continued to impress me with every subsequent film.”[11] Director Anurag Kashyap posted that "the uncensored version of the film is like the director's (Pa.Ranjith) chaotic mind, where so many of his identities are having conversations and conflicting with each other, but want to be in order".