[7][8] Harsh Varrdhan made his acting debut when Rakesh Omprakash Mehra approached him for an art house romantic musical called Mirzya.

Written by the Oscar winning Gulzar, Mirzya used poetry and a Greek chorus as narrative guides, a style that was both bold and unconventional.

[12] The Economic Times gave the film 3.5/5 rating and stated, "Impressive performance by Harsh Varrdhan Kapoor & Saiyami Kher, but a one-time watch.

[16][17] During the pandemic, Harsh worked closely with acting coaches Jeff Goldberg and Suraj Vyas to hone his craft.

[19] Harsh had reportedly also signed on to play the lead in Sriram Raghavan’s Andhadhun but eventually had to withdraw due to scheduling conflicts.

[21] While reviewing Hindustan Times's Rohan Naahar wrote "Manoj Bajpayee, Harsh Varrdhan Kapoor, Ali Fazal and Radhika Madan lead a handful of excellent performers in Netflix's irreverent but inconsistent anthology, based on Satyajit Ray's short stories.

[24] In order to play a quiet character with many shades of grey, he worked hard on his physicality so that body language could speak louder than words.