Nalla Nilavulla Rathri (transl. A fine moonlit night) is a 2023 Indian Malayalam-language slasher film directed by Murphy Devasy in his directorial debut. The film stars Chemban Vinod Jose, Baburaj, Sai Kumar, Binu Pappu, Jinu Joseph, Ganapathi S. Poduval, Rony David Raj, Sajin Cherukayil, and Nithin George. The film follows a group of friends who arrive in Shimoga as part of a business trip and the unforeseen incidents that occur there.

The film was officially announced in September 2022 and principal photography began in the same month in Kanthalloor. Kuttikkanam was another main filming location. The music was composed by Kailas Menon, while the cinematography and editing were handled by Ajay David Kachappilly and Shyam Sasidharan. The film is the first slasher film in Malayalam cinema.

Nalla Nilavulla Rathri was released in theatres on 30 June 2023 to mixed reviews from critics.