Key Point Summary – Walking Dead Star Kelley Mack

• Kelley Mack died Saturday evening at 33 after battling glioma
• Family says she passed with her mother and aunt at her side
• Known for her role as Addy in season 9 of “The Walking Dead”
• Also appeared in “Chicago Med,” “9-1-1,” and films
• Voice work included “Spider-Man: Into the Spider-Verse”
• Had 35 acting and 5 producing credits over her career
• Hollywood and fans express shock and deep sadness

Kelley Mack, a rising force in Hollywood and beloved for her turn as Addy in “The Walking Dead,” has died at just 33. Her family confirmed the heartbreaking news on her Instagram Sunday, revealing she passed away Saturday evening after a fierce battle with glioma, a rare tumor that forms in the brain or spinal cord.

They said she died surrounded by her mother and aunt, calling her “a bright, fervent light” who touched countless lives. Fans and colleagues alike are mourning the loss, with tributes pouring in from across the entertainment world.

A Career Cut Short

Mack’s career spanned more than three decades, starting in the early 1990s. She built an impressive résumé with 35 acting credits and five producing credits. But it was her portrayal of Addy in season nine of AMC’s “The Walking Dead” that made her a fan favorite.

She brought vulnerability, strength, and quiet resilience to the post-apocalyptic survivor — a performance that resonated deeply with viewers. Many fans have taken to social media to share clips and photos of her character, remembering her as “the heart of the camp” in the series.

Beyond The Walking Dead

While zombies gave her the biggest spotlight, Mack proved her range elsewhere. She appeared in “Chicago Med” and “9-1-1,” along with numerous indie films. Her versatility shone in every role — whether she was playing a frantic ER patient, a determined investigator, or a vulnerable young woman facing impossible odds.

One of her lesser-known but most celebrated credits was in animation. She recorded the temporary voice track for Gwen Stacy in the Oscar-winning “Spider-Man: Into the Spider-Verse,” helping shape the character later voiced by Hailee Steinfeld. Colleagues say her energy and wit left a lasting mark on the project.

A Loss Felt Across Hollywood

In the hours after her passing was announced, tributes flooded in from co-stars, producers, and directors. “She was pure light,” one castmate wrote. “Every scene with her was magic.” Fans echoed the sentiment, calling her “unforgettable” and “gone way too soon.”

Mack’s death also reignited conversations about brain cancer awareness, with many urging donations to glioma research in her honor. Advocacy groups have already seen an uptick in contributions since the news broke.

A Private Battle

According to family friends, Mack’s diagnosis came quietly, and she continued to work despite the illness. She kept details private, choosing instead to focus on her craft and her loved ones. Those close to her say she faced the disease with “incredible grace and strength.”

Her family’s statement closed with a request for privacy as they process the loss, thanking fans for the outpouring of love. “She will be missed to depths that words cannot express,” they wrote.

The Legacy She Leaves

Kelley Mack’s passing leaves a void in Hollywood, but her work — from gritty drama to genre television to animated blockbusters — will continue to inspire. Her characters, like her, were resilient, layered, and unforgettable.

As fans revisit her scenes in “The Walking Dead,” one thing is clear: Kelley Mack’s light, though gone far too soon, will not be forgotten.