Kelley Mack, an actress best known for her work on the horror series The Walking Dead, has died at age 33.
In a January Instagram post, Mack revealed she had been diagnosed with diffuse midline glioma, a rare type of cancer.
As an actor, Mack portrayed Addy during the ninth season of The Walking Dead and Penelope Jacobs in the eighth season of Chicago Med, which will return for its 11th season this fall. She was also known for her role as Alice in the horror film Broadcast Signal Intrusion.
In addition to acting, Mack was also a producer, writer and voiceover artist. She provided the voice of Gwen Stacy for the hit film Spider-Man: Into the Spider-Verse.