Over the last decade, immunotherapy has become increasingly important as a treatment modality for various solid tumors. Unfortunately, the development of immunotherapy in the treatment of gastro-oesophageal malignancies has been lagging behind. More recently, however, impressive advancements have been made with immune checkpoint inhibitors in gastro-oesophageal cancers, with a long list of clinical trials yielding promising, and potentially practice changing results. This review provides an overview of the topline results of these studies.