Kelley Mack, who was best known for her role as Addy on the hit TV series “The Walking Dead,” died in Cincinnati last weekend, her family announced Tuesday. She was 33.

Kelley Mack, who played Hilltop resident Addy on 'The Walking Dead' and appeared in Dr Pepper's 'Fansville' ads, dies of a rare form of cancer at age 33.

"The Walking Dead" and "Chicago Med" actress died on Saturday at the age of 33, her sister said in a heartbreaking statement.