Introduction: Involving youth with severe communication disabilities in health research is foregrounded in a perspective of rights and participation. Researchers aligned with a participatory and inclusive research agenda recommend that involving youth in health research should be a deliberate and well-planned process. However, limited examples exist of how researchers can facilitate the involvement of youth with severe communication disabilities in research projects. Method: The aim of this paper was to describe the application of the Involvement Matrix as a conceptual framework to guide the three phases of a research project with youth with severe communication disabilities.Results: Six youth aged 19-34 years consented to be involved in the project. All youth had a severe communication disability and used augmentative and alternative communication (AAC) to support their involvement in the research project. The Involvement Matrix provided a structure to delineate four involvement roles in three research phases: In Phase 1, youth were listeners to research information and advisors in the needs analysis. In Phase 2, as advisors and decision-makers, youth provided their opinions on selecting picture communication symbols for health materials. In Phase 3, as partners, they were copresenters at an online youth forum.