Actor Luke Thallon has officially been cast as Quirinus Quirrell, the nervous Defence Against the Darks Arts professor from Harry’s first year. Thallon is an accomplished stage actor whose credits include Patriots, Albion, and Tom Stoppard's Leopoldstadt. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.