Kelley Mack, best known for her role as Addy on AMC’s The Walking Dead, passed away at the age of 33, leaving behind a legacy marked by talent, resilience, and heartfelt connection with fans. Her life story—from humble beginnings to rising television star—stands as an inspiration to aspiring actors and a poignant reminder of life’s fragility.
1. Early Life and Beginnings
Born as Kelley Lynne Klebenow in Cincinnati, Ohio in July 1992, Kelley showed an early passion for storytelling. With a mini video camera in hand, she began acting in TV commercials during childhood. She attended Hinsdale Central High School, graduating in 2010, and earned a BFA in Cinematography from Chapman University’s Dodge College in 2014. Her foundation in both acting and filmmaking set her apart from many of her peers.
2. Career Highlights
Kelley’s breakout role came in 2018 as Addy, a survivor and member of the Highwaymen group, in Season 9 of The Walking Dead. Her performance, though short-lived, struck a chord with audiences.
- Television:
- The Walking Dead (Season 9) – Addy (5 episodes)
- Chicago Med – Guest appearance as Penelope Jacobs
- 9‑1‑1 – Supporting role
- Film:
- Broadcast Signal Intrusion (2021) – Horror mystery
- Delicate Arch (2025) – Final performance
- Voice Work:
- Voiced Gwen Stacy in promotional materials for Spider‑Man: Into the Spider‑Verse
She also appeared in major commercials for Dr Pepper, Ross, Dairy Queen, Chick‑fil‑A, and Rakuten (alongside her mother Kristen).
3. Personal Strength & Health Journey
In late 2024, Kelley was diagnosed with diffuse midline glioma, an aggressive and rare brain tumor. Her first symptom—a seemingly minor back pain—led to further medical checks, eventually revealing the devastating diagnosis.
Despite losing mobility in her legs after a spinal biopsy, Kelley continued to inspire through social media by documenting her rehab journey. Videos of her climbing stairs with the support of her partner Logan Lanier received immense support. Sadly, she passed away on August 2, 2025, surrounded by family.
4. Legacy & Tributes
For those interested in stories of famous families and the often-hidden struggles behind fame, you may also want to read our detailed article on Seargeoh Stallone, Everything About Sylvester Stallone’s Son. Like Kelley, Seargeoh’s journey reminds us of the unseen battles faced by public figures and their families. Kelley’s sister, Kathryn, shared a moving tribute on Instagram, calling her “a bright, fervent light who transitioned to the beyond.” Fans, colleagues, and her family noted the presence of butterflies in the days after her death—a symbolic message of transformation and peace.
She is survived by:
- Parents: Kristen and Lindsay Klebenow
- Siblings: Kathryn Klebenow and Parker Mack (actor)
- Grandparents
- Longtime partner: Logan Lanier
5. Filmography Overview
Television
- The Walking Dead (2018–2019) – Addy
- Chicago Med – Penelope Jacobs
- 9‑1‑1 – Recurring role
Film
- Broadcast Signal Intrusion (2021)
- Delicate Arch (Posthumous release in 2025)
Voice Work
- Spider‑Man: Into the Spider‑Verse promotional content
Kelley also worked as a producer on five projects, further displaying her range of talent.
6. Raising Awareness: Glioma and Its Early Signs
Kelley’s diagnosis brought national attention to diffuse midline glioma, a condition primarily affecting children and young adults. Common symptoms include:
- Persistent lower back or neck pain
- Numbness or tingling in limbs
- Difficulty walking or poor coordination
- Sudden vision or speech problems
Doctors urge early evaluation for persistent neurological symptoms.
7. Final Projects and Memorial
Her final screen role, Ricky, will appear in the 2025 film Universal. A public memorial service will be held in Ohio on August 16, 2025, for fans and loved ones.
8. Conclusion: A Lasting Legacy
Kelley Mack’s impact reaches far beyond television. Her strength during illness, commitment to acting, and love for storytelling have left a mark on both her industry and community. Fans remember her not only for her characters but for her authentic, inspiring personality.
Her memory lives on through her work, her family, and the countless people she moved. At BetterBulletins, we honor stars like Kelley who shine brightly, even in the face of unimaginable hardship.
