Actress and producer Kelley Mack, known for her work in hit series like T he Walking Dead, Chicago Med, and more, has passed at 33 following a battle with a glioma, ABC r eports.

Kelley Mack, famous for her roles on "The Walking Dead" and "Chicago Med" has died of cancer at age 33. Her sister, Kathryn, announced Mack's passing Tuesday on Mack's Instagram page. Mack died Saturday according to the post.

American actress Kelley Mack died on August 2, 2025, in her hometown of Cincinnati after battling glioma of the central nervous system. A year before her death, she had shared a health update.