In 2006, while at the university, he performed at Tom Moran's Laugh Out Loud comedy nights with fellow student comedians Cahill, Jon Brittain and Joz Norris.

[5] Taking its name from a list that film director Stanley Kubrick kept of titles in search of a script, the show was apparently written while on a solitary visit to Berlin, with the trip itself providing a narrative backbone.

[6] This, his first solo hour-long show, was directed by his friend, playwright Jon Brittain, and made its debut at Leicester Comedy Festival in February 2013, receiving positive notices.

Performing as part of the PBH Free Fringe,[7] the show was very well received, culminating in a five-star review from Chortle's Steve Bennett and a nomination as Best Newcomer in the Fosters Comedy Awards, which he won on 24 August 2013.

[12] Kearns has performed on multiple episodes of panel shows 8 Out of 10 Cats Does Countdown and Richard Osman's House of Games, and he was also a contestant on the fourteenth series of Taskmaster.