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‘Walking Dead’, ‘9-1-1’ star dead at 33
Credit: Getty Images

Kelley Mack died after suffering from serious health problems. She was battling a glioma, a tumor that forms in the brain or spinal cord, according to TMZ. The young actress, who had been working since childhood, was known for her role as Addy in season 9 of The Walking Dead, as well as for her numerous television and film appearances, including Chicago Med and 9-1-1. Kelley Mack was 33 years old.

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