The authors investigated the association between adaptive and maladaptive perfectionism and relationship quality in 197 engaged couples. When both partners were maladaptive perfectionists, they were more likely to be grouped into less functional couple types. Couples in which both partners were adaptive perfectionists tended to cluster in more functional couple types. Maladaptive perfectionism in one partner somewhat decreased the likelihood of higher quality relationships, except in the case of matches with a nonperfectionist. Matches involving nonperfectionists with an adaptive perfectionist partner tended to increase the chance that the relationship would be more functional or satisfying. Implications for practice are discussed, as are directions for future research.