Kelley Mack, best known for her role as Addy in the hit TV series The Walking Dead, has passed away at the age of 33 following a difficult battle with an aggressive and rare brain tumor. Her death occurred peacefully on August 2nd, surrounded by loved ones.
Rising Star with a Growing Legacy
Born Kelley Lynne Klebenow on July 10, 1992, in Cincinnati, Mack developed a passion for performance early in life. After spending her childhood across several states—including Ohio, Illinois, and North Carolina—she pursued her artistic calling by studying cinematic arts at Chapman University in California.
She broke into television with roles in Chicago Med, 9-1-1, and a number of independent films. But it was her emotionally resonant portrayal of Addy in Season 9 of The Walking Dead that garnered widespread recognition and a devoted fanbase. Her performance was noted for its subtle depth and vulnerability, earning her a lasting place in the hearts of viewers.
A Courageous Fight
Kelley’s health challenges began in late 2024 when she experienced what she initially believed to be back pain from a slipped disc. However, over time, her condition worsened. She endured severe leg pain, nerve discomfort, and mobility challenges that made day-to-day life increasingly difficult.
By January 2025, she was diagnosed with diffuse midline glioma, a highly aggressive and difficult-to-treat form of brain and spinal cord cancer. Despite the devastating prognosis, she remained transparent with fans and followers, sharing honest updates about her health while continuing to express gratitude and hope.
Her strength in the face of overwhelming adversity served as a source of inspiration for many, particularly those in the chronic illness and cancer communities.
Remembered with Love
Her family described Kelley as a “bright and fervent light” whose legacy lives on in the many lives she touched—both on-screen and off. In a heartfelt message, they said Kelley would forever be remembered through signs of beauty, like butterflies, which she often associated with moments of peace and clarity.
She is survived by her parents, her sister Kathryn, brother Parker, her partner Logan, and extended family members who stood by her side throughout her illness.
A public memorial will be held on August 16 in Glendale, Ohio. A second celebration of her life is planned for later in Los Angeles, where she spent much of her career.
A Life and Career Cut Short
In addition to her TV work, Kelley was also active in commercial voiceover work and indie film production. She took pride not only in acting but in helping bring powerful stories to life from behind the camera as well.
Even in her final months, Kelley remained creatively curious, spiritually grounded, and unshakably kind. Tributes from friends, colleagues, and fans describe her as compassionate, driven, and deeply empathetic—someone who made others feel seen and valued.
Her final film, in which she plays a character named “Ricky,” is scheduled for release later this year.
Remembering Kelley Mack
- Full Name: Kelley Lynne Klebenow (professionally known as Kelley Mack)
- Born: July 10, 1992
- Died: August 2, 2025 (Age 33)
- Known For: The Walking Dead (Addy), Chicago Med, voice acting, indie film work
- Cause of Death: Diffuse midline glioma, a rare and aggressive central nervous system tumor
- Survived By: Parents, siblings, partner, extended family
Final Thoughts
Kelley Mack’s passing is not only a loss to the entertainment industry but also to those who found strength in her story. Her resilience in the face of terminal illness, combined with her artistry and authenticity, leave behind a legacy far larger than the roles she played.
In the years to come, her name will be remembered not just for what she did, but for how she lived—with courage, grace, and unwavering light.
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