Kelley Mack’s Cause of Death: How the 33-Year-Old ‘Walking Dead’ Star Died

Known for her performance as Addy in ‘The Walking Dead,’ Mack died at the age of 33 following a months-long battle with a rare form of cancer.

Known for her performance as Addy in ‘The Walking Dead,’ Mack died at the age of 33 following a months-long battle with a rare form of cancer.