Chathur Mukham (transl. The Fourth Face) is a 2021 Indian techno-horror thriller film directed by Ranjeet Kamala Sankar and Salil V for the screenplay written by Abhayakumar K and Anil Kurian. The film stars Manju Warrier, Sunny Wayne, Alencier ley Lopez, Niranjana Anoop, Babu Annur, Shyamaprasad and Rony David in lead roles. Manoj has edited the film while Abinandhan Ramanujam handled the cinematography. Dawn Vincent composed the original songs and background score. The film is jointly produced by Jiss Toms and Justin Thomas under Jiss Toms Movies and Manju Warrier Productions. In the film, Thejaswini, a young woman, buys a cheap smartphone after she loses her old one in an accident. Soon, she is terrorised by a malevolent supernatural entity through the phone, which threatens her safety and those of others, making her seek help.

Chathur Mukham is the story of that nightmare, when over acceptance and dependence on technology can take a turn for the worse, leaving one's best friend as the worst enemy. The movie, with the international title 'The Fourth Face' is selected to the 25th Bucheon International Fantastic Film Festival (BIFAN) in South Korea, one of the premier festivals for fantasy and horror. It is showcased in the World Fantastic Red sections of the festival. It was selected to Chuncheon International Film Festival (CIFF) and Méliès International Festivals Federation (MIFF) as Asian entry.