The current study examined variables which contribute to marital satisfaction. Specifically, attachment style, mentalization ability and emotion regulation. The current study examined these variables since they have been found to correlate with successful adult relationships. Furthermore, marital satisfaction has been previously linked with passion, honesty, as well as perceptions of emotional support and comfort. A total of 198 individuals participated in this study who were married at the time of data collection. Individuals were administered the following online self-reports measures: Revised Adult Attachment Scale–Close Relationship Version (RAAS-CRV), Reflective Functioning Questionnaire (RFQ), Interpersonal Emotion Regulation Questionnaire (IERQ), and Couple Satisfaction Index (CSI). The results indicated a relationship between attachment style and marital satisfaction, with lack of attachment anxiety being the most indicative of one’s satisfaction. The study also found a relationship between low mentalization abilities and marital satisfaction. The data demonstrated as individuals scored higher on low mentalization abilities the lower they scored on marital satisfaction. Furthermore, passion, honesty, emotional support, and comfort had the strongest relationship with marital satisfaction. In addition, a multiple linear regression discovered that passion, receiving emotional support and the perception of having a dishonest partner were predictive of marital satisfaction. The current study provides further data for how attachment styles, mentalization and interpersonal emotion regulation strategies relate to marital satisfaction. It also raises questions about how people develop their emotion regulation strategies and how much of one’s marital satisfaction lies in past childhood experiences versus actual experience within the marital relationship.