Kelley Mack, a 33-year-old actress known for her roles in “The Walking Dead,” “9-1-1,” and “Chicago Med,” passed away on Saturday due to glioma, a malignant tumor affecting the central nervous system, as announced by her family on her official Instagram account. The family shared their profound sadness, describing Mack as a “bright, fervent light” and noting her battle with the disease, which involved treatments like surgery and proton radiation therapy.

Mack’s acting career, documented on IMDb since 2008, included various shorts, films, and TV series, with her role as Addy in “The Walking Dead” being particularly notable. Co-stars, including Alanna Masterson and Gustavo Gomez, paid tribute to her on social media, remembering her as an incredible person and a bright light.

Her family announced a celebration of life to be held on August 16 in Glendale, Ohio, with another planned for Los Angeles, emphasizing that Mack will be deeply missed but remembered for her talent, kindness, and vibrant spirit.