Kalaiyarasan Harikrishnan is an Indian actor who works in the Tamil and Malayalam film industries. He was born on February 20, 1986 in Madras, Tamil Nadu. He made his acting debut in 2010 with Mysskin's Nandalala. He won the Vijay Award for Best Supporting Actor in 2015 for his role in Madras (2014).

Harikrishnan's other films include are Arjunan Kadhali (2010), Attakathi (2012), Mugamoodi (2012), Madha Yaanai Koottam (2013), 
Natchathiram Nagargirathu (2022), Gangs Of Madras (2019).

Harikrishnan has collaborated with directors Mysskin and Pa. Ranjith. His upcoming movies include Devara: Part 1.