Nalla Nilavulla Rathri (transl. Fine Moonlit Night) is a 2023 Indian Malayalam-language slasher film directed by Murphy Devasy in his directorial debut. The film stars Baburaj, Chemban Vinod Jose, Jinu Joseph, and Binu Pappu in lead roles, alongside Rony David, Sajin Cherukayil, Ganapathi S. Poduval, and Nithin George in prominent roles. The plot centres around a group of former college mates who plan a trip to Shimoga as part of their business expansion and the unexpected events that occur.

The film's script is written by Murphy Devasy, while the screenplay and dialogue are co-written by Murphy Devasy and Praful Suresh. It is jointly produced by Sandra Thomas and her spouse, Wilson Thomas, under the banner of Sandra Thomas Productions.

This is the first slasher film in Malayalam cinema. It was released in theatres on 30 June 2023 to mixed responses.