Existing literature on the role of religiosity in marital functioning is often difficult to interpret due to the frequent use of convenience samples, statistical approaches inadequate for interdependent dyadic data, and the lack of a theoretical framework. The current study examined the effects of religious commitment and insecure attachment on marital adjustment. Newly married couples who did not have children (N = 92 couples, 184 individuals) completed measures of religious commitment, adult attachment, and marital functioning. There was a small positive association between religious commitment and marital adjustment. Religious commitment buffered the negative association between attachment avoidance and marital adjustment, but exacerbated the negative association between attachment anxiety and marital adjustment.