ABSTRACT Recent research in positive psychology has proposed that the experience of meaning in life (MIL) is multidimensional and consists of three components: mattering, purpose, and coherence. In this model, mattering has been operationalized as the extent to which people feel like they matter on the scale of the universe. The current research suggests this ‘cosmic mattering’ is only part of the picture and explored the relationships between the tripartite components of MIL and one well-established but previously unintegrated context of mattering: interpersonal mattering. Studies 1 and 2 found evidence that interpersonal mattering plays an important role in MIL even while accounting for cosmic mattering, purpose, and coherence. Study 3 experimentally demonstrated that increasing people’s feelings of interpersonal importance increases their sense of MIL. Together, these studies support the idea that interpersonal mattering is a context of existential mattering that contributes to MIL at least as much as cosmic mattering.