Mack’s family also shared the news in a post shared to her official Instagram page this week.
“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,” read a messaged shared with Mack’s more than 14,500 followers.
According to the Cleveland Clinic, glioma is a cancerous tumour that forms in the brain or spinal cord.
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In addition to her work on The Walking Dead, Mack played Penelope Jacobs in Season 8 of NBC’s Chicago Med and booked a role on Fox’s 9-1-1.
Mack’s obituary also noted her commercial work, with parts in ads for Dr Pepper, Ross Stores, Budweiser, Eli Lilly, Dairy Queen, Chick-fil-A and Hyundai.
Kelley Mack arrives at the Los Angeles Friends + Family Premiere of Dark Sky Films and Queensbury Pictures’ “Broadcast Signal Intrusion” at iPic Theaters on Oct. 19, 2021 in Los Angeles.Photo by Amanda Edwards /Getty Images
She also was a voice match for Hailee Steinfeld’s Gwen Stacy in 2018’s Spider-Man: Into the Spider-Verse.
Her big-screen work included roles in 2021’s Broadcast Signal Intrusion, 2024’s Delicate Arch and the soon-to-be-released Universal, which she also executive produced.
“Her vibrant spirit, creative passion and dedication to storytelling left an indelible mark on those who knew her and the audiences she captivated through her work,” her family said.
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Postmedia is committed to maintaining a lively but civil forum for discussion. Please keep comments relevant and respectful. Comments may take up to an hour to appear on the site. You will receive an email if there is a reply to your comment, an update to a thread you follow or if a user you follow comments. Visit our Community Guidelines for more information.