Shipping, which refers to emotional investment in fictional relationships, has been occurring for decades yet has not received much theoretical or any empirical attention. In light of it becoming more recognized in mainstream culture, we wanted to establish whether interest in fictional relationships is a relevant, intriguing, and meaningful form of media engagement. To do this we ran one exploratory study, one preregistered confirmatory replication, and one preregistered extension. Together, these three studies answered several questions: (a) Are people interested in fictional relationships?; (b) Who is likely to be interested?; (c) Why are individuals interested?; and (d) Is interest in fictional relationships a distinct form of media engagement? We found that emotional investment in fictional couples is somewhat common and occurs across a number of media platforms. Being more inclined to think about relationships and have more romantic beliefs was linked to interest in fictional relationships, which reflects a general inclination to focus on relationships. We were also able to demonstrate moderate correlations between relationship interest and other media engagement variables-namely parasocial relationships, narrative transportation, character identification, and celebrity worship-in addition to showing that interest in fictional relationships provides incremental prediction after controlling for these other types of media engagement. These three studies support the notion that relationship interest is a unique and important form of media engagement that is related to individuals' romantic cognition.