Humour is an aspect of interaction that we use without paying much attention, but humour has an important socialising function, also in doctoral education and supervision. When we laugh together, it creates a sense of belonging within the group, as an important part of the socialisation process for doctoral students. We often laugh when we find ourselves in a grey zone, revealing the norms we cross, for example, researchers may joke about the temptation of cutting corners—well knowing that their research would be compromised if they did so. In this chapter, we share examples of how doctoral students can learn about the norms of research through humour and laughter, and thereby be socialised into their research community. Humour can also function to relieve tension in communication, as when supervisors use humour to soften a harsh message. Through this socialisation process, doctoral students shape their identity as researchers, and when they feel included in a group of researchers, they are more likely to have a voice and exercise agency and build their interdependence within their group. Humour can also function as an exclusion or depreciation. When a group laughs at the same joke, those who do not understand the joke will feel excluded. We can also laugh at others, and thereby belittle them. These are some dangers in using humour that supervisors need to be wary of. We hope this hidden aspect of supervision can be used more intentionally to build researcher in(ter)dependence.