The entertainment world is mourning the loss of Kelley Mack, the talented actress recognized for her role as Addy in The Walking Dead. At just 33 years old, Mack passed away in August 2025 after a courageous battle with glioma, a rare form of central nervous system cancer. Her death has sparked an outpouring of tributes and a surge of online searches as fans seek to understand the circumstances surrounding her passing, her career, and her financial legacy.
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Who Was Kelley Mack and How Did She Start Her Acting Career?
Born Kelley Klebenow in Cincinnati, Mack’s passion for storytelling began at a young age after receiving a mini video camera as a birthday gift. She started acting in commercials for brands like Dr. Pepper, Dairy Queen, Ross Stores, and Chick-fil-A during her childhood. Determined to immerse herself in the entertainment industry, she pursued a degree in cinematography at Chapman University’s Dodge College of Film and Media Arts in Orange, California.
“I moved to SoCal for college to study Film Production & Business at Chapman University. I’m all about process of elimination, so I wanted to explore other areas of the entertainment industry to learn and determine what I enjoyed the most,” Mack told Voyage LA in 2020.
After internships with production companies and talent agencies, Mack realized acting was her true calling. “It took several years to be cast in a TV show,” she confessed, highlighting the challenges of breaking into the competitive world of television.
What TV Shows and Projects Did Kelley Mack Work On?
Kelley Mack built an important portfolio, amassing 35 actress and five producer credits throughout her career. She is best remembered for her portrayal of Addy in The Walking Dead Season 9, a role that introduced her to a global fanbase. “It’s such a wonderful project to have been a small part of, and the fans have been amazing and so kind,” Mack once shared in an interview with Wrestling Junkies. “On a professional level, more opportunities have definitely opened up for me, and it feels like it’s given me a little more credibility as an actor, which I am so grateful for.”
In addition to The Walking Dead, she portrayed Penelope Jacobs in Chicago Med and appeared on FOX’s 9-1-1. Her film credits include roles in Profile and Broadcast Signal Intrusion. Mack was also active behind the camera, producing four short films and expressing aspirations to produce a feature-length project.
What Did Kelley Mack Say About Her Health Battle with Glioma?
Kelley Mack bravely shared her health journey with her fans, shedding light on her diagnosis of diffuse midline glioma, an aggressive and rare astrocytoma cancer affecting the brain and spinal cord. “I have been diagnosed with #diffusemidlineglioma, an extremely rare type of #astrocytoma #cancer. Due to the biopsy surgery on my spinal cord, l have lost the use of my right leg and most of my left leg, so I now get around with a walker and a wheelchair,” she revealed via Instagram in January 2025.
Despite the physical challenges, Mack remained optimistic and transparent about her journey. “It has been a very emotional and challenging time, truly testing my mental fortitude, faith, and physical strength,” she wrote. In her final months, she found solace in the support of her family and boyfriend, Logan Lanier, while undergoing radiation treatment in Cincinnati.
In a heartfelt message shortly before her passing, Mack reflected on the difficulties of her treatment: “Overall, this journey has not been easy, but things are getting better – improvements are tough to see when you’re in the thick of it. Thank you again and again for the support and prayers.”
What Was Kelley Mack’s Cause of Death?
Kelley Mack passed away peacefully in August 2025, surrounded by loved ones in her hometown of Cincinnati. The official cause of death was glioma of the central nervous system. A statement on her CaringBridge page expressed the family’s grief: “It is with indelible sadness that we are announcing the passing of our dear Kelley. Such a bright, fervent light has transitioned to the beyond, where we all eventually must go.”
Her sister, Kathryn Klebenow, shared a poignant tribute via Instagram: “Kelley has already come to many of her loved ones in the form of various butterflies 🦋 ❤️. She will be missed by so many to depths that words cannot express.” Her mother Kristen and aunt Karen were present at her bedside during her final moments.
How Did Kelley Mack’s Death Impact Her Fans and Co-stars?
The news of Kelley Mack’s death prompted an overwhelming wave of condolences from fans, friends, and industry colleagues. Alanna Masterson, her co-star from The Walking Dead, wrote: “What an incredible human. So proud to have fought alongside her in our final episode together.” Messages poured in, remembering Mack as a “talented” actress and a “sweet soul” whose positivity left a lasting impression on everyone she met.
Her Instagram page was flooded with heartfelt tributes, while fan communities across social media platforms shared memories of Mack’s kindness and dedication to her craft.
What Is Known About Kelley Mack’s Net Worth?
In the wake of her passing, there has been a notable increase in online searches about Kelley Mack’s net worth. However, reputable sources such as Celebrity Net Worth have not published any official information regarding her financial assets. Despite her rising profile in television and commercial work, Mack’s fortune remains undisclosed.
The curiosity surrounding her net worth is reflective of a broader trend where fans often seek to understand the personal and professional legacies of beloved public figures after their death. Unfortunately, in Mack’s case, no verifiable data about her earnings has surfaced.
What Legacy Does Kelley Mack Leave Behind?
Beyond her acting credits, Kelley Mack’s legacy is defined by her warmth, resilience, and creative spirit. “Kelley was known for her warmth, creativity and unwavering support for those around her,” read the statement on CaringBridge. “Her infectious enthusiasm and dedication to her work inspired countless others in the industry and beyond.”
She is survived by her parents, Kristen and Lindsay Klebenow; sister Kathryn and brother Parker; grandparents Lois and Larry Klebenow; and her boyfriend Logan Lanier. Her family and friends have vowed to keep her memory alive through the stories she told, both on-screen and off.
Mack herself once summed up her approach to life and career: “If I can connect with other people in a way that influences their own life, that’s what fulfills me the most.”