Kelley Mack, a young actress best known for her role as Addy in the hit television series The Walking Dead, has passed away. Her family confirmed the news of her death, which came after a difficult battle with illness. What happened to her? Here’s everything we know about her passing.
How did Kelley Mack die?
According to her family, Kelley died on August 2 in her hometown of Cincinnati. In an official statement, it was revealed that the actress had been fighting a glioma of the central nervous system.
In January, Mack shared on her social media that she had been diagnosed with an astrocytoma, a type of cancerous tumor affecting the central nervous system. At the time, she explained that it all began with lower back pain, which eventually spread to her legs and upper back.
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After undergoing an MRI, doctors discovered an abnormal mass on her spinal cord, which led to significant loss of mobility in her legs. This forced her to use a wheelchair and a walker. Following surgery, Mack received radiation therapy in Cincinnati. And although she frequently shared updates on her recovery, the disease ultimately claimed her life.
Kelley is survived by her parents, Kristen and Lindsay Klebenow, her siblings Kathryn and Parker, and her grandparents, Lois and Larry Klebenow.
How old was Kelley Mack?
At the time of her death, the actress was 33 years old.
What was Kelley Mack’s net worth?
According to estimates, Kelley Mack’s net worth was between $1 million and $2 million. Most of her earnings came from her work as a film and television actress, voice talent, and film producer.
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Who was Kelley Mack?
From an early age, Kelley Mack demonstrated a deep sensitivity for art and visual storytelling. Born on July 10, 1992, in Cincinnati under the name Kelley Lynne Klebenow, she found in film a creative outlet that would shape the course of her life. After finishing high school, she decided to pursue her passion professionally and studied Cinematography at Chapman University, graduating with honors in 2014.
With a clear vision, she moved to Los Angeles to immerse herself fully in the entertainment industry. Her talent and dedication quickly caught attention, and she soon began gaining experience in television, independent film, and voiceover work. Her career took a pivotal turn in 2018 when she played Addy in Season 9 of The Walking Dead — a role that brought her public recognition and opened new doors.
She later appeared in shows like Chicago Med and 9-1-1, and starred in films such as Broadcast Signal Intrusion and Delicate Arch. Her voice was also featured in promotional campaigns and animated characters, including Gwen Stacy in content related to Spider‑Man: Into the Spider‑Verse.
Kelley was also a storyteller behind the camera. She wrote and directed short films like Positive and The Kingdom. Her final project, Universal (2025), showcased her most complete artistic side — as both lead actress and executive producer.
