Breaking News: A Star Gone Too Soon
Today, the entertainment world mourns the loss of Kelley Mack, the beloved actress known for her role as Addy on The Walking Dead. At just 33, Mack passed away on August 2, 2025, in her hometown of Cincinnati, Ohio, after a courageous battle with central nervous system glioma, a rare and aggressive brain cancer. Her family announced the heartbreaking news, leaving fans and loved ones reflecting on her vibrant talent and inspiring life.
Who Was Kelley Mack?
Kelley Mack, born Kelley Lynne Klebenow on July 10, 1992, was a multifaceted talent—actress, producer, and voice artist. Raised in Cincinnati, she discovered her love for storytelling as a child with a mini video camera, a gift that sparked her creative journey. After graduating from Chapman University with a degree in cinematography, she built an impressive career with 35 acting credits and five producer credits.
A Memorable Role as Addy on The Walking Dead
Mack captured hearts as Addy, a Hilltop Colony resident, in Season 9 of AMC’s The Walking Dead (2018–2019). Appearing in five episodes, her performance stood out in the ensemble cast, showcasing her ability to bring depth to even brief roles. Her character’s arc ended tragically when Addy was abducted by the Whisperers, a moment that left fans reeling.
Beyond the Zombie Apocalypse
Mack’s talent extended far beyond The Walking Dead. She portrayed Penelope Jacobs in Season 8 of Chicago Med and appeared in Fox’s 9-1-1. Her film roles included Broadcast Signal Intrusion (2021) and Delicate Arch (2024). With a posthumous appearance in the upcoming Universal (2025) where she also served as executive producer. She lent her voice to Gwen Stacy in Spider-Man: Into the Spider-Verse (2018) and a 2024 Hyundai Ioniq commercial.
The Battle with Glioma
In September 2024, Mack bravely shared her diagnosis of central nervous system glioma, a malignant tumor originating in the brain or spinal cord’s glial cells. Despite undergoing aggressive treatments. Including proton radiation completed in April 2025, the cancer’s progression led to her passing. Her resilience inspired those around her, with her sister Kathryn noting her bravery in facing the disease.
A Life of Passion and Joy
Beyond acting, Mack was an accomplished college tennis player who loved hiking, pickleball, biking, and playing the piano. Her family remembered her as a vibrant spirit whose warmth touched everyone. She collaborated with her mother, Kristen, on projects like a Rakuten commercial and a 1950s baseball script inspired by her family’s history.
Kelley Mack’s Lasting Legacy
Mack’s impact resonates through her work and the lives she touched. Her family shared that she appeared to loved ones as butterflies after her passing, a poignant symbol of her enduring presence. A remembrance is planned for August 16 in Glendale, Ohio, with a Los Angeles celebration of life to follow.
Key Takeaways
- Career Highlights: Starred as Addy in The Walking Dead Season 9, appeared in Chicago Med and 9-1-1, and voiced Gwen Stacy in Spider-Man: Into the Spider-Verse.
- Health Battle: Diagnosed with central nervous system glioma in September 2024; passed away August 2, 2025.
- Legacy: Survived by parents Kristen and Lindsay, siblings Kathryn and Parker, boyfriend Logan, and grandparents Lois and Larry.
- Upcoming Work: Posthumous role as Ricky in Universal (2025).
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A Light That Shines On
Kelley Mack’s journey was cut short. But her creative passion and infectious spirit continue to inspire. Fans are sharing tributes across social media, celebrating her contributions to film and television. As one X post noted, “Her gorgeous smile lit up every room.” Let’s honor her memory by cherishing the stories she told and the joy she brought.
About the Author
Emily Carter is an entertainment journalist with a passion for storytelling and a knack for uncovering the human side of Hollywood. With over a decade of experience covering film and television, she writes to honor the legacies of artists like Kelley Mack. Based in Los Angeles, Emily enjoys hiking and supporting local theater in her free time.
