Kelley Mack, an actress recognized for her roles in acclaimed television series The Walking Dead and Chicago Med, has died at the age of 33. The Cincinnati native, born Kelley Klebenow, passed away in her hometown on Saturday following a prolonged battle with glioma, a rare cancer affecting the central nervous system.
Mack’s career began early, with her talent propelling her into notable television and commercial roles. She gained prominence portraying Addy in The Walking Dead’s spin-off web series Dead in the Water and as Penelope Jacobs in Chicago Med. Beyond on-screen performances, she lent her voice to advertising campaigns for prominent brands, showcasing versatility across mediums. Colleagues and fans alike praised her dedication to artistry and her approachable demeanor.
Alanna Masterson, known for her role as Tara Chambler in The Walking Dead, shared heartfelt condolences on social media, describing Mack as an “incredible human” and expressing gratitude for their collaboration. Tributes from peers emphasized her kindness and professionalism, underscoring her impact both on and off set.
Glioma, the illness Mack confronted, is an aggressive form of brain cancer with limited treatment options, highlighting the challenges faced by patients with rare diseases. Her diagnosis brought attention to the condition, which accounts for under 2% of primary brain tumors.
Memorial services will honor Mack’s legacy across two cities: a gathering at the Glendale Lyceum in Ohio on August 16, 2025, and a Los Angeles event celebrating her contributions to entertainment. Details for the latter remain forthcoming.
Mack’s work in television and voice acting left a lasting impression on audiences, blending grit and emotional depth in her performances. As admirers mourn her passing, her artistic legacy continues to resonate, reflecting a career marked by passion and perseverance.
