William teaches youth drama classes at The Court Theatre and was a member of the Youth Company, devising and performing in Duets, Lysistrata, The Crucible and Trios. In 2018 he returned to the Youth Company to co-direct Vernon God Little.
With Two Productions, William devised and performed in the Anthony Harper Summer Theatre season of The Little Prince and The Most Boring Show On Earth, and is a member of their mentorship programme.
He is a regular cast member of The Murder Mystery Dinner Theatre and in early 2019 he interned with Red Leap Theatre Company in Auckland. Other theatre credits include Hairspray and the 2018 production of Les Misérables with Showbiz Christchurch.
In 2017 he created his first solo show, Shit Finds Love. A second and third show featuring Burns’ alter ego, Peter Partridge have since followed. A fourth solo show premieres later in late 2019.