Just months before her passing at age 33, actress Kelley Mack, known for her role as Addy in AMC’s The Walking Dead, was candidly sharing her battle with glioma—a rare brain tumor—on social media, including her struggle to re-learn how to walk following her diagnosis[1]. Mack documented her journey with honesty, humor, and transparency, showing glimpses of both her physical challenges and determination.
Kelley Mack died peacefully in her hometown of Cincinnati after battling glioma—a type of tumor that affects the brain or spinal cord[2]. The announcement, made via her Instagram on August 5, 2025, described Mack as a “bright, fervent light” remembered for her warmth, creativity, and unwavering support for others[4]. The statement highlighted her “infectious enthusiasm and dedication to her work,” and remarked that she inspired countless people within and outside the entertainment industry[2].
Beginning acting as a child, Mack’s credits include The Walking Dead, Unusual Suspects (2015), Not Your Average Joe (2016), Unscrewed (2016), 9-1-1 (2019), and Chicago Med (2022)[2]. Her final credit, both on screen and as executive producer, will be for the upcoming project Universal (2025)[2][3].
Kelley Mack is survived by her parents, Kristen and Lindsay Klebenow; sister Kathryn and brother Parker; grandparents Lois and Larry Klebenow; and her boyfriend, Logan Lanier[2]. Statements from her family and friends emphasize that her legacy will endure through her creative contributions and in the hearts of those who knew her[2]. She is remembered for her talent, kindness, and vibrant spirit, and will be deeply missed and forever remembered[2].
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