This rapid review looks at the publicly available evidence in relation to lessons and best practice from joint (donor, government and non-state armed actors) coordination of donor support for peace processes. A rapid review has time limitations which mean what is presented is based on an overview of public literature and a few expert comments, rather than a systematic and rigorous study, and the findings should be understood in this light. There appear to be few cases of such joint coordination, especially in relation to the involvement of non-state armed groups, and very little information regarding lessons and best practices in relation to their principles, structure and processes. It is possible that much more joint coordination and lessons learning has occurred than can be found rapidly using open source searches, which makes it difficult to gauge what best practices for joint (donor, government and non-state armed actors) coordination of donor support for peace processes are.