Les Mills, a New Zealand Olympian, founder of the global group fitness brand Les Mills, and a former mayor of Auckland, has died at the age of 91. Sources report that he opened a gym in Auckland in 1968, which later expanded into an international group fitness business. He is also described as having competed in four Olympic Games, reflecting a long athletic career at the highest level. Beyond sport and business, Mills served in public office: reports say he served three terms as mayor of Auckland. The combined accounts depict Mills as a figure who moved from Olympic competition into fitness entrepreneurship and later into local government leadership. His death is reported by multiple outlets, with the age and the broad outline of his achievements—Olympic participation, the 1968 Auckland gym that grew internationally, and his mayoral service—consistently cited. No details about the cause of death are provided in the supplied summaries.