Remembering Kelley Mack: ‘The Walking Dead’ Star's Legacy and the Battle With Glioma

Hollywood Mourns the Loss of Kelley Mack, Rising Star and ‘The Walking Dead’ Fan Favorite

Los Angeles, CA — Kelley Mack, the talented actress best known for her portrayal of Addy in Season 9 of AMC’s The Walking Dead, has passed away at the age of 33. Her family confirmed that she died following a courageous and private battle with glioma, a rare and aggressive form of cancer that affects the central nervous system.

🌟 A Bright Talent Gone Too Soon

Fans of The Walking Dead will remember Kelley Mack as Addy, a member of the Hilltop community introduced in the ninth season. Despite her brief time on the show, she quickly became a fan favorite thanks to her compelling performance and onscreen presence.

Beyond the post-apocalyptic world of zombies, Mack had memorable roles in shows like Chicago Med and 9-1-1. Her performances were always grounded, emotionally resonant, and showed a promising career that was only just beginning to flourish.

🧠 What Is Glioma?

Glioma is a type of tumor that occurs in the brain and spinal cord. It arises from glial cells that support nerve cells. These tumors can be particularly aggressive, with few early symptoms. In Mack’s case, her family noted that she chose to keep her diagnosis private while continuing to work and live with immense grace and courage.

According to reports, Mack had been quietly undergoing treatment while staying largely out of the spotlight in recent years.

💬 Tributes from Fans and Co-Stars

Social media has been flooded with tributes from The Walking Dead community, with fans sharing scenes, quotes, and messages honoring Mack’s legacy. Fellow cast members expressed their heartbreak and praised her talent, kindness, and determination.

“She brought so much heart to our set,” one cast member posted. “Her strength, both on and off screen, will never be forgotten.”

🎗️ Raising Awareness About Glioma

Mack’s passing has brought renewed attention to glioma, particularly in young adults. Advocates hope her story will inspire increased research and funding for early detection and treatment of central nervous system tumors.

🙏 A Legacy of Strength and Talent

Kelley Mack’s work—especially her role as Addy—will continue to resonate with Walking Dead fans for years to come. Her talent, strength, and story serve as a reminder of how precious and fleeting life can be.

Her family has requested privacy but encourages those who wish to honor Kelley’s memory to donate to glioma research foundations or cancer support charities.