Hearn is a founding member of the British theater company Mischief Theatre. His stage credits include plays such as The Play That Goes Wrong, Peter Pan Goes Wrong, The Comedy About a Bank Robbery and Magic Goes Wrong.[2] He also appears in the BBC comedy series The Goes Wrong Show. Rise of Skywalker director J.J. Abrams is a collaborator of Mischief, serving as producer since the Broadway production of The Play That Goes Wrong.