Kelley Mack, the actor best known for playing Addy in Season 9 of AMC’s “The Walking Dead,” has died at the age of 33. Her family said she passed peacefully on Aug. 2 in her hometown of Cincinnati after battling a glioma of the central nervous system, a rare and aggressive type of brain and spinal-cord cancer. The death was announced in posts on Instagram and the caregiving site CaringBridge. Born Kelley Klebenow, Mack accumulated 35 acting credits and five producing roles during a career that spanned television, film and commercial work. Beyond her turn in the zombie drama, she appeared in NBC’s “Chicago Med,” Fox’s “9-1-1,” the indie thriller “Broadcast Signal Intrusion” and provided voice work for the animated hit “Spider-Man: Into the Spider-Verse.” A remembrance service is scheduled for Aug. 16 at the Glendale Lyceum in Ohio. Mack is survived by her parents Kristen and Lindsay Klebenow, sister Kathryn, brother Parker and partner Logan Lanier.