While exposure and response prevention (ERP) remains the gold standard for obsessive-compulsive disorder (OCD) treatment, acceptance and commitment therapy (ACT) offers a complementary approach by enhancing psychological flexibility, focusing on valued actions, and addressing experiential avoidance. The article highlights ACT’s potential to improve engagement and outcomes in OCD treatment, particularly for those who do not respond fully to traditional ERP. Empirical evidence supports ACT’s effectiveness, suggesting it as a viable alternative or adjunctive therapy for OCD.