Mischief Theatre is a British theatre company founded in 2008 by a group of students from The London Academy of Music & Dramatic Art in West London, and directed by Henry Lewis, Jonathan Sayer, and Henry Shields. The group originally began by doing improvised comedy shows, but by 2012 they expanded into comedic theatrical performances that includes choreographed routines, jokes, and stunts.

The company is best known for their performances as the fictional theatre company, The Cornley Polytechnic Drama Society, who attempt several amateur performances that comedically go wrong. Significant work by the company includes the award-winning 2012 stage play The Play That Goes Wrong and the BBC television series The Goes Wrong Show. Several of the stage performances by the company have been shown in the West End of London, and also in theatres across the United Kingdom, North America, and Europe.