Pariyerum Perumal (transl. The Emperor who mounts a Horse) is a 2018 Indian Tamil-language drama film, written and directed by Mari Selvaraj in his directorial debut and produced by Pa. Ranjith. The film stars Kathir and Anandhi, while Yogi Babu and G. Marimuthu appear in supporting roles. It follows Pariyan (Kathir), who belongs to an oppressed caste and enters into law college with a lot of hope, and strikes up a friendship with Jothi Mahalakshmi (Anandhi), who belongs to an upper caste, which irks Jothi's family members. He wakes up to the realities of caste oppression and discrimination, after being harassed by them.

Director Selvaraj, who wrote short stories for Ananda Vikatan in the past, was approached by Ranjith after reading some of his works. Ranjith who is impressed with the script, decided to produce the film. The film's principal shoot took place in Tirunelveli and Thoothukudi, since the film depicts the lives of the people in the region. The film features music composed by Santhosh Narayanan, with cinematography handled by Sridhar and editing done by Selva R. K.

Pariyerum Perumal released on 28 September 2018, and received critical acclaim, with critics praising the technical aspects, direction, screenplay, performance of the film's cast, especially Kathir's performance. The film received four Ananda Vikatan Cinema Awards, including Best Story and Best Director for Selvaraj, six nominations at the 8th SIIMA Awards, receiving two wins, four nominations at the 66th Filmfare Awards South, receiving an award for Best Film. The film was honoured at the Touluse Indian Film Festival and the 16th Chennai International Film Festival, receiving an award for the best feature, and was also screened at the 49th International Film Festival of India.