PurposeThe concepts of luxury and pro-environment may be viewed as being in contradiction with each other. Consequently, it is unclear how to promote pro-environmental luxury brands. The present research seeks to develop effective advertising strategies for pro-environmental luxury brands by employing mixed emotional appeals.Design/methodology/approachTwo experimental studies were conducted to test two hypotheses. Study 1 examines the effects of mixed emotions (happiness and sadness vs. happiness alone) on intentions to purchase a pro-environmental luxury product. Study 2 replicates the findings of Study 1 using a different product and extends it by establishing the underlying mechanism.FindingsThe results reveal that an advertisement featuring mixed emotions of happiness and sadness (vs. happiness alone) enhances intentions to purchase a pro-environmental luxury product. Further, the effect is mediated by cognitive flexibility.Originality/valueThe present research tests a novel perspective on how mixed emotional appeals can leverage the advertising effectiveness of pro-environmental luxury brands.