Kelley Mack, Actress Who Starred In “The Walking Dead,” Dies At Age 33
Actress Kelley Mack died on August 2, 2025, in her hometown of Cincinnati, Ohio. (Photo Credit: Barry Brecheisen / Getty Images)
Actress Kelley Mack Died In Cincinnati On August 2
The entertainment world finds itself mourning the death of a talented young actress, producer, and voice-over artist, Kelley Mack.
USA Today reports that Kelley Mack passed away on August 2 in her hometown of Cincinnati, Ohio, at the age of 33.
Mack’s agent, Julie Smith, confirmed she died following a battle with glioma of the central nervous system. Mack shared her diagnosis in January, saying:
“I am very grateful to have such a supportive and loving family and boyfriend, who have been with me every second of this process. It has been a very emotional and challenging time, truly testing my mental fortitude, faith, and physical strength. They are so positive and we have a sense of calm knowing that my healing is taking place and we will overcome. This experience has brought me closer to God, and I am leaning on him and trust his plan for me.”
What Is Glioma?
The Mayo Clinic describes glioma as “a growth of cells that starts in the brain or spinal cord.” As the glioma grows, it forms a tumor. That tumor “can grow to press on brain or spinal cord tissue and cause symptoms. Symptoms depend on which part of the brain or spinal cord is affected.”
Some types of glioma become cancerous (also known as malignant). The Mayo Clinic states, “Malignant gliomas grow quickly and can invade healthy brain tissue.”
After Kelley Mack died, her sister, Kathryn Klebenow, shared a heartbreaking post on her Instagram page. She wrote:
“It is with indelible sadness that we are announcing the passing of our dear Kelley. Such a bright, fervent light has transitioned to the beyond, where we all eventually must go.”
The actress’ family announced that her memorial service will take place on August 16 at the Glendale Lyceum in Glendale, Ohio. The family plans to hold a second service in Los Angeles at a future date.
What Was Kelley Mack Known For?
Kelley Mack starred in dozens of projects over the years. Most people recognize her from the show The Walking Dead. She played the character Addy across five episodes of the show’s ninth season, which aired from 2018 to 2019.
Additionally, Mack appeared in shows such as 9-1-1, Chicago Med, and Schooled. She also appeared in films, including Broadcast Signal Intrusion and Mr. Manhattan.
Mack starred in and served as the executive producer on the upcoming feature film Universal. She also directed, edited, and wrote the 2015 short film, Positive. The 2016 short film, A Knock at the Door, which Mack produced, won the Festival Award at the Atlanta Horror Film Festival.
Mack’s sister, Kathryn Klebenow, left her followers with this message:
“She would want you all to know how much she loves you. And as her sister, I want you all to know how brave that tough SOB was, especially when she decided to make the leap to be reunited with God…”
Our hearts and prayers go out to Kelley Mack’s family as they mourn her death. May she rest in peace…
