Kelley Mack, the actress known for her role as Addy on The Walking Dead and for lending her voice to the world of Spider-Man: Into the Spider-Verse, has died. She was 33 years old. Her family confirmed her passing on August 2, 2026, in her hometown of Cincinnati, Ohio, stating that she died peacefully surrounded by loved ones.
News of her death was met with an outpouring of grief from fans and colleagues. While Mack battled a serious illness, a report described her death as “very unexpected.” Her family has been open about her struggle with cancer, providing a clear understanding of what happened.
Kelley Mack Cause of Death: What We Know
The primary question surrounding the story is the cause of death. Multiple credible news outlets, including ABC News and The Hollywood Reporter, have reported that the cause was complications from a glioma. According to those reports and the family’s obituary, she had been diagnosed with a diffuse midline glioma affecting her central nervous system. This information has been widely reported and is attributed to official family statements, providing a factual answer to the question of what happened to Kelley Mack.
33
The Walking Dead (Addy), Voice of Spider-Gwen
August 2, 2026
Glioma of the Central Nervous System
- Cause Confirmed: Kelley Mack’s death was due to complications from glioma, a type of brain tumor.
- Family Statement: Her sister Kathryn shared the family’s announcement that she “passed away peacefully” on Saturday evening.
- Role Recognition: Her role as Addy in The Walking Dead Season 9 is her most prominent credit for mainstream audiences.
- Voice Work: Beyond live-action roles, she had a significant voice acting presence, notably as Spider-Gwen.
- Privacy and Speculation: The open disclosure of the cause of death by the family has minimized speculation, allowing for a focused memorialization of her career.
| Fact | Detail |
|---|---|
| Full Name | Kelley Lynne Klebenow |
| Professional Name | Kelley Mack |
| Born | July 10, 1992 |
| Died | August 2, 2026 |
| Age at Death | 33 |
| Hometown | Cincinnati, Ohio |
| Education | Chapman University (Dodge College of Film and Media Arts, 2014) |
| Known Roles | Addy (The Walking Dead), Penelope Jacobs (Chicago Med), Voice of Spider-Gwen |
Who Did Kelley Mack Play in The Walking Dead?
For many, Kelley Mack’s most recognizable role was that of Addy in the ninth season of The Walking Dead. Addy was a member of the Hilltop community, a survivor group in the post-apocalyptic series. Her character was part of a key storyline during that season, making her a familiar face to millions of viewers.
What Other Shows Was Kelley Mack In?
Beyond the zombie drama, Mack built a solid television resume. She appeared in the procedural drama 9-1-1 and played Penelope Jacobs in season 8 of Chicago Med. These roles showcased her range, moving from a high-stakes survival series to the fast-paced world of first responders and medical drama.
Kelley Mack’s career spanned from a guest spot on 9-1-1 to a recurring role on Chicago Med, demonstrating her ability to adapt to different genres and character types within the television landscape.
Kelley Mack Age and Life Timeline
Understanding the timeline of her life provides context to her career and her loss. Kelley Mack was born on July 10, 1992, making her 33 years old at the time of her death. She was born and raised in Cincinnati, Ohio, and graduated from Chapman University’s Dodge College of Film and Media Arts in 2014.
How Old Was Kelley Mack When She Died?
She died at the age of 33. This fact has been confirmed across multiple sources, including ABC News. Her birth date of July 10, 1992, and her death date of August 2, 2026, confirm her age.
- July 10, 1992: Born in Cincinnati, Ohio.
- 2014: Graduated from Chapman University.
- 2018: Portrayed Addy in Season 9 of The Walking Dead.
- 2020-2025: Secured guest star roles on 9-1-1 and Chicago Med; voiced Spider-Gwen.
- August 2, 2026: Passed away peacefully at age 33, surrounded by family in Cincinnati.
Filmography: Roles on 911, Chicago Med, and Behind the Scenes
Kelley Mack was more than an actress; she was a producer, writer, and voice-over artist with 35 acting credits and five producing credits. Her filmography highlights a career focused on both popular television and independent film. She also had a notable role in the film Broadcast Signal Intrusion, playing the character Alice.
Voice Work and Commercials
Reports indicate that Mack contributed voice work to Spider-Man: Into the Spider-Verse, although the exact nature of the role—whether as a primary voice or a matching performer for Hailee Steinfeld’s Gwen Stacy—varies slightly between reports. Her professional portfolio was also enriched by commercial work for brands like Dr Pepper, Ross, and Dairy Queen.
Beyond her famous roles, Kelley Mack accumulated over 35 acting credits and produced five projects. This illustrates a deep commitment to storytelling that extended beyond performing to creation.
Is There a Kelley Mack Wikipedia Page?
Yes, Kelley Mack has a Wikipedia page that now reflects her passing. It serves as a standard biographical reference, detailing her early life, education, and professional timeline. Her IMDb page provides a complete, verified list of her professional credits, serving as the most definitive source for her filmography.
What Was Kelley Mack’s Last Photo?
The last photograph posted on her personal social media accounts has not been officially confirmed by her family as her final image. While her personal website, kelleymack.com, contains many professional and personal photos—including her voice-over portfolio—the specific date of her last post is not widely reported. This is a matter of private memory for her family and friends.
Established Information
- Kelley Mack passed away on August 2, 2026 (confirmed by family).
- She was born on July 10, 1992, making her 33 at death.
- She played Addy in The Walking Dead Season 9.
- She had roles in 9-1-1 and Chicago Med.
- She died of complications from glioma of the central nervous system.
Information That Remains Unclear
- The specific details of her last days or hospital location are not public.
- The exact nature of her Spider-Verse role (match vs. primary) is slightly varied across reports.
- The precise date of her last Instagram photo is not officially confirmed.
Context: The Impact of Her Work and Passing
Kelley Mack’s career trajectory shows a move from mainstream exposure on The Walking Dead to a more diverse portfolio of guest spots and voice work. Her role as Addy resonated with a generation of horror fans, while her voice work connected her to the massive Spider-Verse franchise. The open disclosure of her cause of death by her family has been an important factor in the public’s understanding. The phrase “passed away peacefully” appears in the family statement, a choice that emphasizes the dignity and privacy of her final moments.
Sources and Quotes
“It is with indelible sadness that we are announcing the passing of our dear Kelley…”
— Instagram Family Statement
“Kelley passed peacefully on Saturday evening.”
— Facebook Family Statement
Summary: Remembering Kelley Mack
Kelley Mack was a talented actress and filmmaker whose work touched popular culture through The Walking Dead and the Spider-Verse. She passed away at 33 due to complications from glioma. Her family’s statements have helped clarify the cause of death, and her professional legacy lives on through her filmography. She is survived by her parents, siblings, and partner.
Frequently Asked Questions
Was Kelley Mack in 911?
Yes, she appeared as a guest star on the television series 9-1-1.
Who does Kelley Mack play in Chicago Med?
She played the character Penelope Jacobs in season 8 of Chicago Med.
What is Kelley Mack’s net worth?
Her net worth has not been publicly disclosed by her family or representatives.
Was Kelley Mack married?
Reports indicate she was survived by a partner, but her marital status has not been officially stated.
How old was Kelley Mack when she died?
She was 33 years old at the time of her death on August 2, 2026.
What is glioma?
Glioma is a type of tumor that occurs in the brain and spinal cord. Her family reported it affected her central nervous system.
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Philip Rowe is Senior Reporter at UKBullet.uk, covering breaking UK news stories.