Kalaiyarasan Harikrishnan was born on February 20, 1986. He is currently married to Shanmuga Priya, whom he met while working at Accenture. 

Kalaiyarasan is a prominent Indian actor recognized for his contributions to the Tamil film industry. He began his career in 2010 with the film "Arjunan Kadhali," though it remained unreleased. His breakthrough came with the critically acclaimed film "Madras" (2014), directed by Pa. Ranjith, where he portrayed Anbu, earning him widespread recognition. Following this success, he starred in significant roles in films such as "Kabali" (2016) alongside Rajinikanth and "Adhe Kangal" (2017), where he played a blind chef. His performances are noted for their depth and authenticity, showcasing his versatility as an actor. Kalaiyarasan has also ventured into web series, featuring in projects like "Victim" and "Sengalam." With a growing filmography that includes both lead and supporting roles, he continues to be a significant figure in contemporary Tamil cinema.