There are more than 1 million people in the UK looking after a family member or friend with cancer, but half the number of these carers do not receive support to care. Providing this care significantly affects cancer carers emotionally, physically, and financially. Community and district nurses have a vital role to play in reaching out to these hidden carers and signposting them to the correct support. This article provides tips on identifying carers, including who they are, the challenges they face, and how health professionals can approach and speak to them. It also provides guidance on signposting carers to national and local sources of support in the UK.