The Walking Dead Actress Kelley Mack Dies at 33 After Battle with Glioma

Published: August 5, 2025, 21:00 (U.S. Eastern Time)

Kelley Mack, the Ohio-born actress best known for her role in The Walking Dead, has passed away at the age of 33. The news was confirmed by her family through her official social media accounts and in a published obituary on Tuesday, August 5.

Mack, born Kelley Klebenow, died on August 2 after being diagnosed with glioma, a rare form of cancer affecting the central nervous system. According to her obituary, she passed away peacefully surrounded by her loved ones.

Early Life and Education

Kelley Mack was born and raised in Cincinnati, Ohio. She graduated from Hinsdale Central High School in 2010 and went on to earn a bachelor’s degree in cinematography from Chapman University’s Dodge College of Film in Orange, California, in 2014.

Her passion for storytelling began early. A video camera she received as a birthday gift as a child sparked her interest in filmmaking and performance. Not long after, she began appearing in commercials, setting the stage for her career in the entertainment industry.

Career Highlights

Mack built an impressive résumé, with 35 acting credits and five producing credits to her name. She gained widespread recognition for her portrayal of “Addy” in Season 9 of AMC’s The Walking Dead, which ran for 11 seasons from 2010 to 2022.

Her television work also included appearances as “Penelope Jacobs” in NBC’s Chicago Med (Season 8) and roles in FOX’s 9-1-1. On the big screen, she played “Alice” in Broadcast Signal Intrusion and “Wilda” in Delicate Arch, released in 2024.

In addition to acting in film and television, Mack was featured in national commercials for brands including Dr. Pepper, Ross Stores, Dairy Queen, and Chick-fil-A. More recently, she appeared alongside her mother, Kristen, in a Rakuten advertisement.

Her talents extended to voice-over work as well. She was a voice match for Hailee Steinfeld’s character, Gwen Stacy, in the Academy Award-winning animated 1film Spider-Man: Into the Spider-Verse.

Personal Life and Interests

Known by friends and colleagues for her warmth, creativity, and unwavering support of others, Mack’s life extended far beyond her professional accomplishments. She enjoyed hiking, biking, playing pickleball, traveling, and playing the piano.

Her obituary described her as someone who “cherished time with her family and friends, finding joy in collaboration and storytelling.”

Posthumous Work

Mack’s legacy will continue with her upcoming role as “Ricky” in a yet-to-be-released Universal Pictures project. This posthumous appearance is expected to be a testament to her enduring talent and dedication to her craft.

Family and Legacy

Kelley Mack is survived by her parents, Kristen and Lindsay Klebenow; her sister Kathryn; her brother Parker, who is also an actor; her grandparents Lois and Larry; and her longtime partner, Logan.

Her family’s statement on Instagram read, in part:

“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.”

Accompanied by a single photograph, the message reflected the deep love and admiration felt by those closest to her.

Remembering Kelley Mack

Though her life was cut short, Mack leaves behind a rich legacy of artistry and kindness. Her colleagues in the entertainment industry, as well as her fans around the world, remember her as a gifted performer who brought authenticity and heart to every role.

Her obituary noted that she “found joy in collaboration and storytelling” — a passion that was evident in her work and in the relationships she built throughout her career.

Kelley Mack’s impact, both on and off screen, will continue to resonate with those who had the privilege to work with her and those who enjoyed her performances.