The present invention provides compositions, methods, and kits comprising one or more RORγ inhibitors, alone or in combination with one or more anticancer drugs, such as an anti-androgen drug, that are useful for treating cancer, e.g., prostate cancer, such as castration-resistant prostate cancer (CRPC), and numerous other types of cancer including lung cancer, breast cancer, liver cancer, ovarian cancer, endometrial cancer, bladder cancer, colon cancer, lymphoma, and glioma.