This chapter provides a sociological theory of the stand-up comedian. It seeks to establish a theory of humour which arises in modern societies and the sociality that drives such humour. Although there are philosophical theories of humour, as well as anthropological theories of comedy figures – clowns, jokers, jesters, fools, tricksters – this chapter argues that a sociological theory of humour needs to be sensitive to the type of sociality, personhood and collective representations which drive contemporary stand-up comedy. To this end it outlines stand-up comedy as the art of ‘intra-personal’ relations where ‘self-other’, stranger sociality is built, improvised and performatively situated.