Existential happiness is happiness that one has a basic life at all. Having a basic life, as I understand it, involves being the subject of experiences and being an agent in some minimal sense. As I argue, existential happiness is a fitting response to having a basic life. To make this argument, I look at two possible accounts of the fittingness of existential happiness: the value of a basic life and attachment to the constitutive elements of one’s life. I also consider a few possible sources of existential happiness, including encounters with death, counterfactual thinking, and hedonically positive feelings of awe directed toward one’s own consciousness.