Actress Kelley Mack, best known for her role playing Hilltop Colony resident Addy on The Walking Dead, has died at age 33.

Axar.az informs via Independent, Mack died Saturday in Cincinnati after being diagnosed with glioma of the central nervous system, according to a statement shared by her family.

Mack appeared in several shorts and TV series, including Unusual Suspects (2015), Grayson: Earth One (2015), Not Your Average Joe (2016), Unscrewed (2016), and Chicago Med (2022).

Mack’s final credit, both on-screen and as executive producer, is the forthcoming Universal (2025).

“Her vibrant spirit, creative passion and dedication to storytelling left an indelible mark on those who knew her and the audiences she captivated through her work,” her family said.