Kelley Mack , whose TV credits included a recurring stint as Addy on The Walking Dead , has died at age 33 after a battle with cancer.

Mack passed away Saturday in her native Cincinnati after suffering from glioma of the central nervous system (a type of tumor that starts in the brain or spinal cord), her sister Kathryn announced via Mack’s Instagram : “It is with indelible sadness that we are announcing the passing of our dear Kelley. Such a bright, fervent light has transitioned to the beyond, where we all eventually must go.”

The caption added: “Kelley has already come to many of her loved ones in the form of various butterflies… She will be missed by so many to depths that words cannot express.”

Mack “would want you all to know how much she loves you,” Kathryn concluded. “And

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