AbstractIn this paper, we argue that friendship should receive more attention in social/personality research. Here, we focus on our area of expertise, personality traits, and review the literature on how personality traits influence friendship formation, maintenance, and dissolution. Specifically, we examine how personality traits of the actor and partner influence friendship development (i.e., who is more likely to initiate and end friendships, and who is more likely to be the target of friendship initiation and termination). We also discuss dyadic effects, such as personality similarity, on friendship development. Throughout this review, we draw on the literature on personality and romantic relationships to identify the most important gaps in the literature on personality and friendships. Our review suggests that agreeableness has the most consistent effects on both romantic relationships and friendships, followed by neuroticism. Extraversion, conscientiousness, and openness to experience have all been shown to influence relationship development, but their effects are inconsistent. We end with a call for more research on friendship beyond the role of personality traits and suggestions for specific future directions.