Kelley Mack: 10 things to know about late ‘Walking Dead’ star
Kelley Mack is dead
The entertainment world is mourning the loss of Kelley Mack, a talented actress best known for her role as Addy in AMC’s post-apocalyptic drama The Walking Dead. She passed away peacefully on August 2, 2025, at the age of 33, following a courageous battle with diffuse midline glioma—a rare and aggressive cancer of the central nervous system. Kelley Mack’s death has left fans, colleagues, and loved ones heartbroken, but her legacy continues through the characters she brought to life, the films she created, and the lives she touched. Beyond her most recognizable roles, Mack’s life was filled with artistic purpose, personal strength, and unwavering warmth. Here are 10 important things to know about this remarkable actress.
1. Her Real Name Was Kelley Klebenow
While professionally known as Kelley Mack, the actress was born Kelley Lynne Klebenow on July 10, 1992, in Cincinnati, Ohio. She later adopted “Mack” as a stage name when she began her acting career, combining elements from family nicknames and early creative aliases.
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2. She Discovered Her Passion for Film Early
Kelley’s journey into acting and filmmaking began in childhood when she received a mini video camera as a birthday gift. That early introduction to visual storytelling ignited a lifelong love for the screen—both in front of and behind the camera. As a child, she acted in local commercials, which eventually blossomed into a professional acting and production career.
3. She Studied Cinematography at Chapman University
After graduating from Hinsdale Central High School in Illinois, Mack pursued her passion for filmmaking at Chapman University’s Dodge College of Film and Media Arts in California. She graduated with a degree in cinematography in 2014, equipping her with the skills to work behind the scenes as well as on camera.
4. Her Breakout Role Was in The Walking Dead
Mack rose to prominence for her role as Addy, a survivor in Season 9 of The Walking Dead. Her portrayal of the brave and resourceful teen was featured across five episodes and left a lasting impression on the fanbase. She starred alongside actors like Alanna Masterson, who later paid tribute to her as “an incredible human” and “sweet soul.”
5. She Starred in Chicago Med and 9-1-1
Beyond The Walking Dead, Mack built an impressive résumé of television work. She portrayed Penelope Jacobs in NBC’s Chicago Med and also appeared in a guest role on FOX’s 9-1-1. Her performances were marked by emotional depth and authenticity, no matter how brief her appearances.
6. She Was a Passionate Filmmaker and Producer
Mack didn’t just act—she also produced and starred in several award-winning short films. Notable among them was A Knock at the Door, a short thriller that won the Jury Choice Award at the Atlanta Horror Film Festival. Other productions included The Perfect One, Positive, and Margo. She was also involved in directing and editing various projects, always driven by a desire to tell impactful stories.
7. She Was Active in Commercial and Voice-Over Work
Kelley lent her talents to numerous commercial campaigns for major brands, including Dr. Pepper, Ross Dress for Less, Dairy Queen, and Chick-fil-A. She also did voice-over work and was even selected to dub lines for Gwen Stacy in promotional content for Spider-Man: Into the Spider-Verse, matching Hailee Steinfeld’s voice and tone with remarkable precision.
8. Her Battle with Glioma Was Brave and Inspiring
In late 2024, Mack began experiencing unexplained back pain and nerve issues. Doctors initially suspected a herniated disc, but further testing revealed a diffuse midline glioma, an aggressive form of brain and spinal cord cancer. Surgery to remove part of the tumor resulted in partial paralysis, but Mack remained resilient, supported by her family and partner. Despite her physical challenges, she maintained her spirit and creative spark.
9. She Passed Away Surrounded by Loved Ones
Kelley Mack passed away on August 2, 2025, in her hometown of Cincinnati. She was surrounded by close family members, including her mother and aunt. The announcement of her death came via her Instagram page and CaringBridge, followed by an outpouring of grief and admiration from friends, co-stars, and fans. She was remembered as “bright,” “kind,” and “passion-driven.”
10. Her Legacy Lives On in Film, Family, and Memory
Mack is survived by her parents, Kristen and Lindsay Klebenow; her siblings Kathryn and Parker (also an actor); her grandparents, Lois and Larry Klebenow; and her longtime partner, actor Logan Lanier. A public memorial service is scheduled for August 16 in Cincinnati. In her 33 years, Kelley left behind a legacy of artistic excellence, empathy, and fearless creativity that will continue to inspire.
In Loving Memory
Kelley Mack may no longer walk among us, but her performances, her films, and her indomitable spirit endure. She showed that creativity, courage, and kindness could coexist beautifully, even in the face of immense adversity.
