Odiyan (transl. Shapeshifter) is a 2018 Indian Malayalam-language fantasy drama film directed by V. A. Shrikumar Menon in his feature film debut. The film was written by Harikrishnan; it is based on the legend of the Odiyan clan, who in Kerala folklore are men believed to possess shapeshifting abilities and can assume animal forms. Odiyans are said to have inhabited the Malabar region of Kerala before the widespread use of electricity. The film stars Mohanlal in the title role, alongside Prakash Raj and Manju Warrier; it was produced by Antony Perumbavoor through Aashirvad Cinemas.

Principal photography began in Varanasi, Uttar Pradesh in August 2017. Major parts of the film were shot in Palakkad district, where the story's Thenkurissi village was recreated. Some scenes were filmed in Vagamon, Athirappilly, and Kochi. The film was completed after 145 days of shooting. Sam C. S. composed the film's score, which also features songs composed by M. Jayachandran. Odiyan was released worldwide on 14 December 2018 alongside its dubbed versions in Tamil and Telugu languages.

Upon release, Odiyan received positive reviews from critics who praised the performances, score and action sequences but criticized the direction, VFX and the screenplay. Despite it the film grossed more than ₹54 crore worldwide in two weeks into release, becoming one of the highest-grossing Malayalam films of all time.