Researchers convened a public event on climate diplomacy, co-sponsored by Sister Cities International, to address forms of collaboration around climate change, primarily among countries in the Caribbean. Panelists discussed the role of religious traditions and actors, as often overlooked stakeholders in shaping public perceptions and priorities regarding climate change in small island development states (SIDS), including the ways in which climate concerns are connected to other issues such as development, sustainability, and migration. It also considered the roles of faith leaders, and other religious actors, as they participate in often transnational climate advocacy networks, and contribute to established and new forms of climate diplomacy among SIDS nations. Panel participants included select ambassadors from SIDS nations and concerned with climate change.