Actress Kelley Mack of ‘The Walking Dead’ Passes Away at 33 After Battle with Glioma

Kelley Mack, an actress known for her role in the popular TV series ‘The Walking Dead,’ has passed away at the age of 33. Mack died peacefully in her hometown of Cincinnati on August 2, 2025, after a battle with glioma, a type of tumor affecting the brain and spinal cord. Her passing was confirmed through a statement on CaringBridge, which was also shared on her Instagram. Kelley Mack was remembered by her colleagues and fans for her warmth, creativity, and dedication to her craft. In addition to her role as Addy in ‘The Walking Dead’ season 9, she also appeared in notable shows like ‘Chicago Med’ and ‘9-1-1.’ Mack’s career spanned 35 acting credits and 5 producer roles, as well as commercial and voice-over work for brands like Dr. Pepper and Dairy Queen. She was celebrated for her enthusiasm, which inspired many within the entertainment industry. Mack, a graduate of Chapman University, is survived by her parents, siblings, and boyfriend. The actress’s legacy will continue through her contributions to film and television, as well as the impact she had on those who knew her personally.