Krish was born in Tiruchirappalli, Tamil Nadu, India, but shifted to New York City after his father, a banker, had moved abroad on a posting. He thus shifted schools and spent 15 years in the United States. During his time in New York City, Krish worked as an assistant on the sets of The Cosby Show and National Treasure: Book of Secrets (2004), helping the teams conduct pre-production works. He also completed an acting course at the New York Film Academy and performed at the Broadway in a Walt Disney production of Aladdin, before arriving in Chennai, hoping to get a breakthrough in the industry as an actor.