Hollywood is grieving the heartbreaking loss of actress Kelley Mack, who passed away at the age of 33. Best known for playing Addy in The Walking Dead, Kelley died on August 2 in Ohio after a private battle with glioma — a rare and aggressive tumor of the central nervous system. Her family confirmed the tragic news on Instagram on August 5, revealing that she passed peacefully, surrounded by her mother and aunt. Her sister posted an emotional tribute, calling Kelley a “bright, fervent light.” In addition to acting, Mack was also a screenwriter, known for co-writing a baseball-themed drama with her mother. Fans continue to honor her memory and talent, remembering her strength, spirit, and lasting presence on screen.