Kenneth Mathew Sebastian, known as Kenny Sebastian, was born on December 31, 1990, in Pala, Kottayam, Kerala, India. Raised in Bangalore, he attended Kendriya Vidyalaya NAL and later earned a degree in Visual Arts from Karnataka Chitrakala Parishath. Kenny married Tracy Alison Viegas on January 16, 2022, in Goa. The couple welcomed their first child, a daughter named Emily, in 2024.

Kenny's career began with the creation of his YouTube channel in 2008, where he uploaded skits, song covers, and stand-up clips, amassing over 152 million views. He gained prominence with his Amazon Prime special "Don't Be That Guy" and the sci-fi comedy web series "Star Boyz." He has performed globally, including in the United States, Singapore, the UAE, and Australia. In 2020, he released the Netflix special "The Most Interesting Person in the Room." Kenny also served as a judge on the comedy reality show "Comicstaan."