Kelley Mack Dies at 33: Hollywood is grieving the tragic loss of actress Kelley Mack, who passed away on August 2, 2025, in Cincinnati, Ohio. At just 33 years old, Kelley lost her courageous battle with Diffuse Midline Glioma (DMG), a rare and aggressive cancer. Her death has left her fans, family, and colleagues in shock and sorrow.

Early Life and Education:
Kelley Mack, born July 10, 1992, in Cincinnati, Ohio, was a passionate and determined individual from a young age. She attended Hinsdale Central High School, graduating in 2010, and later studied cinematography at Chapman University, earning her degree in 2014. From early on, it was clear that Kelley was destined for a life in the arts, both in front of and behind the camera.
Rise to Fame:
Her big breakthrough came with AMC’s iconic series The Walking Dead. In Season 9, which aired between 2018 and 2019, Kelley portrayed the character Addy, a role that instantly connected her with fans. Her performance brought a refreshing energy to the show and made her a recognized name in the entertainment industry.
She also made appearances in other popular TV shows, including 9‑1‑1 on Fox and Chicago Med on NBC. Kelley’s work showed her versatility and ability to embody diverse roles with authenticity and depth.
Film Career and Creative Ventures:
Beyond television, Kelley built an impressive film career. She starred in Broadcast Signal Intrusion (2021), Delicate Arch (2024), and most recently Universal (2025). In Universal, she played the role of Ricky while also serving as a co‑producer, reflecting her expanding creative vision.
Her talents extended into the world of commercial voice‑overs as well. She worked with brands like Dr. Pepper, Chick‑fil‑A, and Hyundai Ioniq. She even contributed voice‑match work for Gwen Stacy in Spider‑Man: Into the Spider‑Verse promotions. Kelley’s love for storytelling shone through every project she touched.
Passions Beyond Acting:
Outside her career, Kelley was a multi‑talented individual with a zest for life. She enjoyed pickleball, biking, hiking, and traveling. A gifted musician, she played the piano and often found peace in creative hobbies. Friends and family remember her as a warm, vibrant soul who inspired those around her with both her laughter and her kindness.
A Sudden Illness:
In September 2024, Kelley’s life changed drastically. She began experiencing persistent back pain, nerve‑related itching, and discomfort in her legs. Initially, doctors believed it was a slipped disc or exhaustion. However, an MRI revealed a rare and aggressive tumor pressing on her spinal cord.
She was diagnosed with Diffuse Midline Glioma, a grade IV brain and spinal tumor. This condition is not only extremely rare but also highly aggressive, with limited treatment options. Despite the grim prognosis, Kelley chose to face her illness with unmatched bravery.
Fighting the Battle:
Kelley underwent a spinal biopsy in January 2025, which left her with limited use of her legs. She relied on a walker and later a wheelchair, yet she never let the illness define her spirit.
She openly shared her journey on social media, inspiring many with her resilience. In March, she proudly posted about her progress, including being able to walk up and down stairs — small victories that became powerful symbols of hope. Her story resonated deeply, reminding others to cherish life’s little moments.
Peaceful Farewell:
On the evening of August 2, 2025, Kelley passed away peacefully. Her mother, Kristen, and her devoted aunt Karen were by her side during her final moments. On August 5, her sister Kathryn announced the heartbreaking news on Instagram.
Kathryn described her as a “bright, fervent light” who touched many lives. She added, “Kelley decided to meet God as the tough SOB she was. I’m so proud of her.” She also shared that loved ones felt Kelley’s presence in the form of butterflies — a comforting symbol for those mourning her loss.

Honoring Her Memory:
Kelley’s family has arranged two remembrance events. The first, a recognition and remembrance ceremony, will take place on August 16, 2025, in Glendale, Ohio. A larger celebration of life is planned later in Los Angeles, where colleagues, fans, and friends will gather to honor her.
Her legacy will live on through her roles in film and television, her voice work, and the countless lives she touched with her optimism and courage. More importantly, her journey has helped raise awareness about the symptoms of spinal and brain tumors, potentially encouraging earlier diagnoses for others in the future.
A Lasting Legacy:
Though Kelley’s time on earth was tragically short, the impact she left is profound. She will be remembered as a talented actress, a fearless fighter, and a compassionate human being. Her story is not just about loss but about strength, resilience, and love.
Kelley Mack’s life reminds us all to embrace our passions, cherish our loved ones, and face challenges with courage. Even in her toughest moments, she remained an inspiration, proving that true strength lies in the heart.
As fans and family gather to say their goodbyes, Kelley’s spirit will continue to shine brightly. Her performances, her laughter, and her memory will remain alive, ensuring that her legacy endures for generations.
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