The judges on The Voice Australia for 2025 are Kate Miller-Heidke, Melanie C (the Spice Girl), Ronan Keating, and Richard Marx. Kate Miller-Heidke is the only returning judge from the previous season, while Melanie C, Ronan Keating, and Richard Marx are new judges for 2025. This lineup brings together a mix of Australian and international music talent to coach and guide the contestants on the show.