Kelley Mack in Walking Dead is being remembered by fans and the entertainment world following her untimely passing at the age of 33 on August 2, 2025. She gained fame for her portrayal of Addy, a member of the Hilltop Colony in Season 9 of The Walking Dead, and quickly became a fan favorite for her grounded performance and emotional depth.
Her death has left shockwaves across social media platforms, where tributes from co-stars, fans, and fellow creators continue to pour in. Mack reportedly passed away peacefully after a prolonged battle with a rare central nervous system glioma—a form of brain tumor that had severely affected her health in the past year.
A Rising Star Cut Short
Kelley Mack was born on July 10, 1992, and began her journey in the performing arts with aspirations not only to act but also to create and direct. She studied cinematography and moved to Los Angeles, where she built a career marked by both passion and precision.
Some of her notable achievements include:
- Recurring role as Addy in The Walking Dead Season 9
- Appearances in Chicago Med, 9-1-1, and indie thriller Broadcast Signal Intrusion
- Voice-over work for major brands and animated promos
Her character Addy, introduced during the Hilltop Colony arc, resonated with viewers for her emotional backstory and quiet strength. While Addy’s on-screen time was brief, the role showcased Mack’s ability to bring depth to ensemble scenes.
Brave Battle With Illness
Mack was diagnosed with a rare glioma of the central nervous system in late 2024. Despite undergoing surgery, radiation, and therapy, the disease progressed quickly. She remained creatively active throughout much of her treatment, even contributing to voiceover work from home and attending small virtual readings with her community of artists.
Her resilience during this time was quietly admirable. According to those close to her, Mack often said her goal was “to tell stories that outlive her.” Her sister shared an emotional statement that described Kelley as “a warrior in life and a butterfly in spirit.”
Loved By All Who Knew Her
Kelley’s loss has deeply affected both her professional and personal circles. She is survived by her parents, her sister, her brother, and her longtime partner. Friends have described her as someone who lifted others up without seeking attention, and her castmates noted how her presence on set made others feel at ease.
One co-star wrote, “She may have had a small role in the show, but she left a massive mark on our hearts.”
Her fans have taken to social media with fan art, edited tributes, and hashtags like #RememberingAddy and #KelleyMackForever trending in her honor.
Last Projects and Lasting Legacy
In her final year, Mack worked on a short film where she served as both producer and lead actress. That project, tentatively titled Universal, was released just weeks before her death and is now being shared widely as a tribute to her talent and commitment to the craft.
Mack’s creative legacy spans more than just her filmography—it’s also in how she mentored younger actors, supported indie filmmakers, and gave back to cancer research charities in her final months.
Her story reminds us that even a short life can leave a long impact.
Kelley Mack’s death is a profound loss, not just to fans of The Walking Dead, but to everyone who believes in the power of storytelling. Though she may be gone, her performances, her kindness, and her strength will be remembered by all who knew her or watched her on screen.
What are your favorite moments of Kelley as Addy? Share your thoughts or tributes below—we’d love to hear how she impacted you.