Actress Kelley Mack , best known for roles in The Walking Dead and Chicago Med , was reportedly showing signs of improvement in her cancer battle before taking a turn for the worse right before her death, TMZ reported on Thursday (August 7).

Mack, 33, whose real name was Kelley Klebenow , reportedly experienced a "nice recovery" after undergoing treatment for the rare diffuse midline glioma in February before the cancer relapsed, spreading throughout her body in the weeks leading up to her death, according to a family source, who described the situation as a "quick end." The actress was reported to have spent an "immense" amount of time with loved ones during that span, having done some voiceover work last month.

Mack died in her hometown of Cincinnati last Saturday (Aug

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