Kelley Mack Dies at 33 From Rare Brain Cancer

Kelley Mack, a talented young actress whose career showed remarkable promise, passed away on August 2, 2025, at the age of 33. Her death, confirmed by her family and an official obituary, was the result of complications from diffuse midline glioma, a rare and aggressive form of brain cancer. News of her passing has left fans, colleagues, and the wider entertainment community deeply saddened by the loss of a gifted performer taken far too soon.

Born in Dallas, Texas, in 1992, Mack discovered her love for performance at an early age. She pursued acting passionately, studying theater and honing her craft before making her way into film and television. Her breakout role came on AMC’s acclaimed series The Walking Dead, where she played Adeline in Season 9. Though her role was brief, her performance was memorable, and she quickly became a recognizable figure within the show’s expansive fan base.

Mack also appeared in independent films, shorts, and web productions, showcasing a natural range that hinted at a bright future in the industry. Her work was often praised for its authenticity and emotional depth, qualities that allowed her to connect with audiences even in smaller roles. Colleagues who worked alongside her have remembered her as a generous and dedicated artist who brought warmth and focus to every project she joined.

In addition to her screen work, Mack pursued creative endeavors behind the camera. She produced and collaborated on independent projects, further establishing herself as a multifaceted talent committed to storytelling in all its forms. Her determination and versatility reflected not only her artistic ambition but also her resilience in the face of challenges.

That resilience became especially evident when she was diagnosed with diffuse midline glioma, a rare brain tumor that is particularly aggressive and difficult to treat. Despite the diagnosis, Mack faced her illness with remarkable courage, continuing to inspire friends and loved ones with her strength and grace. While her career was tragically cut short, the impact she made in a relatively brief period has left a lasting impression.

Her family, in confirming her passing, spoke of her creativity, kindness, and unwavering spirit. Fans have since taken to social media to share tributes, expressing both grief at her loss and gratitude for the performances she gave. Many remembered her contribution to The Walking Dead as an important milestone, while others reflected on her independent projects and the artistic risks she embraced.

At just 33, Kelley Mack’s passing is a stark reminder of the fragility of life and the profound losses that cancer continues to inflict. Yet her story is not defined solely by illness. It is also the story of a young woman who pursued her dreams with passion, who left an indelible mark on those who knew her, and who inspired others through her courage.

Her legacy now rests in the memories of her performances, the projects she helped bring to life, and the example she set for others navigating both the highs and challenges of creative work.

Kelley Mack is survived by her family, friends, and a community of fans who will continue to remember her light. While her journey was tragically brief, her artistry, resilience, and kindness will remain enduring parts of her story.