Kelley Mack, the actress beloved by fans for her role as Addy in The Walking Dead, has sadly passed away at just 33 years old after a courageous battle with a rare form of cancer.
The heartbreaking news was confirmed in a statement posted to her official Instagram page on August 5, 2025:
“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.”
Kelley first appeared on AMC’s long-running hit series during Season 9, portraying Addy, a member of the group known as The Highwaymen. Her performance resonated with fans, not just for her bravery on-screen, but for the vulnerability and strength she brought to the character.
Outside of television, Kelley was also known for her work in short films and independent projects. Her passion for acting and her warm, generous spirit made her a cherished presence both on and off screen. She remained active with her followers through social media, often sharing behind-the-scenes moments, life updates, and support for cancer awareness causes.
A Community Mourns
Tributes have flooded in from AMC castmates, producers, and fans around the world. Co-stars remembered her as a gentle soul with “unshakable positivity” who left a lasting mark on the show’s legacy.
In her honor, fans have begun posting artwork, quotes from her lines on the show, and messages of remembrance using the hashtag #RIPKelleyMack.
Her family has requested privacy during this difficult time but encouraged those who wish to honor her memory to donate to cancer research foundations or hospice care programs in her name.
Though gone far too soon, Kelley Mack’s light will continue to shine through the roles she brought to life, the causes she championed, and the hearts of the many lives she touched.