We examined perceptions of cross-class heterosexual couples, that is, couples where couple members differ in social class. Informed by social dominance theory, system justification theory, and equity theory, we predicted that (a) cross- (vs. same-) class couples would be perceived more negatively, (b) cross-class couples with the woman (vs. the man) in the higher class position would be evaluated more negatively, and (c) same-class low-low (vs. high-high) couples would be evaluated more negatively. We examined perceptions of cross-income, cross-education, and cross-occupation status relationships. We found support for our predicted patterns, with some exceptions. In general, high-high class couples were preferred. In three of four studies, a higher-class woman paired with a lower-class man was evaluated most negatively of all couples. Recognition of this prejudice may explain challenges faced by certain couples and couple members; as such, implications for clinicians and counselors are discussed. Further, our research generates directions for future research. Additional online materials for this article are available on PWQ’s website at http://journals.sagepub.com/doi/suppl/10.1177/0361684319878459