
KEY POINTS
- Kelley Mack passed away on August 2, 2025, in her hometown, aged 33
- Diagnosed with an aggressive CNS glioma in late 2024
- Roles across TV: The Walking Dead, Chicago Med, 9‑1‑1; films and commercials
Kelley Mack, beloved by fans for her portrayal of Addy in season nine of The Walking Dead, has died at the age of 33. She passed away peacefully on 2 August in her hometown of Cincinnati after a courageous fight with glioma, a rare and aggressive cancer of the central nervous system. Diagnosed in late 2024, her illness advanced rapidly, and she spent her final months surrounded by the people she loved most.