Kelley Mack, Actress from THE WALKING DEAD Series Passes Away at Age 33, Here is Her Profile

The entertainment world is once again mourning the death of Kelley Mack, a young actress known for her role in the popular series THE WALKING DEAD. This talented actress passed away at the age of 33 in early August 2025. The news of her passing shocked many, including fans and fellow artists.

Kelley Mack is known not only for her iconic role but also for her dedication to the world of acting. Her departure leaves a deep impression through her strong acting and cheerful personality. Here is complete information about Kelley Mack, including her struggle against illness and the works she left behind.

Read the news about Kelley Mack's death at Liputan6.com.

1. Brief Profile of Kelley Mack

Kelley Mack (credit: instagram/itskelleymack)

Kelley Mack, born Kelley Lynne Klebenow, passed away on August 2, 2025, in Cincinnati, Ohio, at the age of 33. A graduate of Chapman University with a degree in Film & Cinematography, she began her acting career after attending Hinsdale Central High School.

Kelley Mack died suddenly at the age of 33. She took her last breath on August 2 in Cincinnati, the city where she was born and raised. This sad news was conveyed by her agent, Julie Smith, and confirmed to USA TODAY on August 5.

2. Sad News Announced by Her Sister

Kelley Mack (credit: instagram/itskelleymack)

The sad news of Kelley Mack's passing was first revealed by her sister, Kathryn Klebenow. Kathryn shared the news through a post on Instagram. In her message, she wrote:

"With deep sorrow, we announce the passing of our beloved Kelley. A bright and spirited person has now moved on to a further place, a place that we too will eventually go."

3. Once Struggled Against a Rare Disease

Kelley Mack (credit: instagram/itskelleymack)

Kelley's death was caused by a glioma, which is a malignant tumor that attacks the central nervous system. Glioma originates from abnormal glial cells, which are cells that protect and support the nerve cells of the brain and spinal cord. According to the National Cancer Institute (NCI), glioma is the most common type of malignant brain tumor in adults.

4. Final Condition and Memorial Plans

Kelley Mack (credit: instagram/itskelleymack)

Earlier in April, the family had stated that Kelley had completed a series of proton radiation treatments. This treatment was part of the efforts to cure the disease she suffered from.

To honor Kelley's life, the family plans to hold two memorial events. The first event will take place on August 16 in Glendale, Ohio. Additionally, a celebration of life will also be held in Los Angeles, although the exact date has yet to be determined.

5. Kelley Mack's Acting Career

Kelley Mack (credit: instagram/itskelleymack)

Kelley Mack started her career through commercials and short films. She became widely known after playing Penelope Jacobs in season 8 of CHICAGO MED.

However, her role as Addy in season 9 of THE WALKING DEAD made her even more recognized and loved by fans of the series. Her emotional and strong acting made her one of the memorable faces in the franchise.

6. FAQ About Kelley Mack

Who is Kelley Mack?
Kelley Mack is an American actress and film producer known for her roles in THE WALKING DEAD and CHICAGO MED.

How old was Kelley Mack when she passed away?
Kelley passed away at the age of 33.

What was the cause of Kelley Mack's death?
She died from glioma, a type of malignant tumor that affects the central nervous system.

When did Kelley Mack pass away?
She passed away on August 2, 2025, in Cincinnati.

What are some important roles of Kelley Mack?
She played Penelope Jacobs in CHICAGO MED and Addy in THE WALKING DEAD.

Will there be a memorial event for Kelley Mack?
Yes, the family is holding a memorial event in Glendale, Ohio, and planning a celebration of life event in Los Angeles.

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(kpl/psp)