National strategies are needed to continue to promote the broader benefits of participating in sport and organised physical activity to reduce physical inactivity and related disease burden. This paper employs the RE-AIM framework to evaluate the impact of the federally funded $150 million Move it AUS program in engaging inactive people in sport and physical activity through the Participation (all ages) and Better Ageing (over 65 years) funding streams. A pragmatic, mixed-methods evaluation was conducted to understand the impact of the grant on both the participants, and the funded organisations. This included participant surveys, case studies, and qualitative interviews with funded program leaders. A total of 75% of participants in the Participation stream, and 65% in the Better Ageing stream, were classified as inactive. The largest changes in overall physical activity behaviour were seen among socioeconomically disadvantaged participants and culturally and linguistically diverse participants. Seven key insights were gained from the qualitative interviews: Clarity of who, Partnerships, Communication, Program delivery, Environmental impacts, Governance, and that Physical inactivity must be a priority. The Move It AUS program successfully engaged physically inactive participants. Additional work is needed to better engage inactive people that identify as culturally and linguistically diverse, Aboriginal and/or Torres Strait Islander and those that live in disadvantaged communities in sport and physical activities. Tangible actions from the seven key insights should be adopted into workforce capability planning for the sport sector to effectively engage physically inactive communities.