TV Actress Kelley Mack Passes Away at 33 After Battle With Rare Brain Tumour

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Hollywood is mourning the loss of actress Kelley Mack, who died at the age of 33 following a difficult battle with a rare form of brain cancer.

Mack, whose full name was Kelley Klebenow, died on Saturday in her hometown of Cincinnati. She had been privately battling glioma of the central nervous system, a rare and aggressive brain tumour.

Best known for her role as Addy in The Walking Dead and as Penelope Jacobs in Chicago Med, Mack built a diverse career in both television and commercial work. She was also widely respected for her talent in voice-over acting and had featured in a number of high-profile advertising campaigns.

Her colleagues, fans, and friends have been paying tribute to her life and work, remembering her not only for her skill on screen but also for her warmth and professionalism behind the scenes.

Alanna Masterson, her former co-star on The Walking Dead, described her as an “incredible human” and said she felt honoured to have worked with her.

A memorial service will take place at the Glendale Lyceum in Glendale, Ohio, on August 16, 2025. In addition, a separate celebration of life is being planned in Los Angeles to honour her contributions to the entertainment world.

Mack’s legacy as an actress and a kind soul will continue to live on through her work and the impact she made on those who knew her.

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