Kelley Mack, an actor who starred in "The Walking Dead," died due to complications from the COVID-19 vaccine. Actor Kelley Mack, who was best known for playing Addy on the TV show "The Walking Dead," died at age 33 on Aug. 2, 2025, her sister announced in an Instagram post .

The Walking Dead star Kelley Mack has died aged 33.

Mack starred in TV shows like ‘The Walking Dead’ and ‘Chicago Med.’  We’re remembering her life and career here.