Kelley Mack, an actress best known for her role as Addy in the ninth season of the television series "The Walking Dead," died at the age of 33 after battling a rare form of brain cancer known as glioma. Mack also appeared in the medical drama "Chicago Med." She publicly shared her struggle with the tumor earlier in the year, which caused loss of mobility in her legs. Despite undergoing treatment, her death was described as unexpected by those close to her. Mack was praised for her resilience and the support she received from her boyfriend, Logan Lanier, during her illness. Over her career, she contributed to more than 30 productions, leaving a notable legacy in the entertainment industry.