ObjectivesTo describe and reflect on the consumer engagement approaches used in five living guidelines from the perspectives of consumers (i.e., patients, carers, the public, and their representatives) and guideline developers. Study Design and SettingIn a descriptive report, we used a template to capture engagement approaches and the experiences of consumers and guideline developers in living guidelines in Australia and the United Kingdom. Responses were summarized using descriptive synthesis. ResultsOne guideline used a Consumer Panel, three included two to three consumers in the guideline development group, and one did both. Much of our experience was common to all guidelines (e.g., consumers felt welcomed but that their role initially lacked clarity). We identified six challenges and opportunities specific to living guidelines: managing the flow of work; managing engagement in online environments; managing membership of the panel; facilitating more flexibility, variety and depth in engagement; recruiting for specific skills–although these can be built over time; developing living processes to improve; and adapting consumer engagement together. ConclusionConsumer engagement in living guidelines should follow established principles of consumer engagement in guidelines. Conceiving the engagement as living, underpinned by a living process evaluation, allows the approach to be developed with consumers over time.