Kelley Mack, the actress best known for playing Addy in The Walking Dead, has passed away at the age of 33. She died peacefully on August 2, 2025, in Cincinnati after battling a rare and aggressive brain cancer.
Key Highlights
|
Detail |
Description |
|
Date of Death |
August 2, 2025 |
|
Age |
33 |
|
Cause |
Diffuse midline glioma (a rare central nervous system cancer) |
|
Known For |
Role as Addy in The Walking Dead (Season 9) |
| Other Appearances |
Chicago Med, 9‑1‑1, Delicate Arch, Broadcast Signal Intrusion |
| Recent Film |
Universal, released just before her passing |
| Family’s Tribute |
Described her as a “bright, fervent light” and noted butterfly sightings |
| Memorial Date |
August 16, 2025, in Glendale, Ohio |
Kelley Mack, whose real name is Kelley Lynne Klebenow, began her acting journey after graduating from Chapman University in 2014. With a degree in cinematography, she relocated to Los Angeles to pursue a career in the entertainment industry.
Over the years, she made a name for herself with over 35 acting credits. Her most recognized role came in Season 9 of The Walking Dead, where she played Addy, a survivor in the post-apocalyptic world. Additionally, she appeared in popular TV shows such as Chicago Med and 9-1-1.
Moreover, Kelley showcased her talent in several films, including Delicate Arch and Broadcast Signal Intrusion. Her last film, Universal, premiered just weeks before her passing, highlighting her dedication to her craft even during her illness.
In late 2024, doctors diagnosed Kelley with diffuse midline glioma, a rare and aggressive type of brain cancer. After a spinal biopsy, she lost the use of her legs, but despite this, she remained hopeful. In an inspiring update, she shared a video of herself climbing stairs with the help of her partner.
Her family announced her passing on Instagram and CaringBridge, saying she died peacefully, surrounded by loved ones. They mentioned that butterflies began appearing to friends and family soon after her passing, a symbol they now associate with her spirit.
Kelley’s sister described her as brave, strong, and deeply spiritual. Her memorial service is scheduled for August 16 in Ohio, and her family plans to hold another celebration of life in Los Angeles shortly.
