On August 2, 2025, the entertainment industry and fans worldwide mourned the loss of Kelley Mack, a beloved actress, producer, and voice-over artist who passed away at 33 in Cincinnati, Ohio, after a valiant battle with glioma of the central nervous system. Known for her memorable role as Addy on The Walking Dead, Kelley’s vibrant spirit and multifaceted career left an unforgettable legacy. ClickUSANews honors her life, achievements, and the light she shared with the world.

A Shining Career in Film and Television

Kelley Mack, born Kelley Lynne Klebenow on July 10, 1992, was a dynamic talent with 35 acting credits and five as a producer. She captured hearts as Addy, a Hilltop Colony resident, in five episodes of The Walking Dead Season 9 (2018-2019), where her character’s gripping storyline included a perilous encounter with the Whisperers. Her television portfolio also featured roles on 9-1-1 (2019), Chicago Med (2022) as Penelope Jacobs, Schooled (a Modern Family spinoff), and miniseries such as Unusual Suspects (2015) and Grayson: Earth One (2015).

In film, Kelley starred in Broadcast Signal Intrusion (2021) alongside Harry Shum Jr., Delicate Arch (2024), Mr. Manhattan, and the forthcoming Universal (2025), where she also served as an executive producer. Her voice-over work included matching Hailee Steinfeld’s Gwen Stacy in the Academy Award-winning Spider-Man: Into the Spider-Verse (2018) and a 2024 Hyundai Ioniq commercial. Kelley’s commercial work spanned brands like Dr Pepper, Budweiser, Eli Lilly, Dairy Queen, Chick-fil-A, and Rakuten, the latter featuring her mother, Kristen.

As a producer, Kelley’s credits included the short film A Knock at the Door (2016), which won the Jury Choice Award at the Atlanta Horror Film Festival and streamed on AMC’s Shudder. She also produced and wrote Positive (2015), produced The Perfect One, and was an associate producer on the upcoming TV series Eclipse. Her debut acting role in The Elephant Garden (2008) earned her an Acting Award from Tisch School of the Arts, with the film receiving a Student Visionary Award at the Tribeca Film Festival.

A Life of Joy and Resilience

Born in Cincinnati, Ohio, Kelley grew up across Wyoming, Ohio; Mount Lookout, Ohio; Ellisville, Missouri; Avon, Connecticut; Charlotte, North Carolina; and Hinsdale, Illinois. Her passion for storytelling ignited with a childhood gift of a mini video camera, leading to early commercial roles. She graduated from Hinsdale Central High School in 2010 and earned a bachelor’s degree in cinematography from Chapman University’s Dodge College of Film in 2014, balancing her acting career with expertise in film production.

Kelley was an avid college tennis player and loved hiking, pickleball, biking, playing piano, and traveling. Her playful side shone through her affection for dark chocolate, bourbon, popcorn, fantasy football, stuffed and real animals, country music, and her knack for a British accent. Despite being a lifelong smoker, she faced her cancer diagnosis with remarkable courage, openly sharing her treatment journey, including regaining mobility after spinal cord biopsy surgery left her temporarily unable to walk. Her boyfriend, Logan Lanier, stood by her through her challenges.

A Heartfelt Goodbye

Kelley passed away peacefully, surrounded by her mother, Kristen, and aunt, Karen. Her sister, Kathryn, announced her passing on Instagram, writing, “Such a bright, fervent light has transitioned to the beyond, where we all eventually must go.” The post highlighted Kelley’s spiritual presence, noting her appearances as butterflies to loved ones. Tributes poured in, with The Walking Dead co-star Anthony Michael Lopez sharing, “Kelley was such a sweet and happy soul and I’m happy to have met her. She fought so hard.”

Kelley is survived by her parents, Kristen and Lindsay Klebenow; sister, Kathryn; brother, Parker, also an actor; grandparents, Lois and Larry; and boyfriend, Logan. A remembrance service is scheduled for August 16, 2025, at 1 p.m. at the Glendale Lyceum in Glendale, Ohio, with a Los Angeles celebration of life planned for her industry peers.

A Lasting Legacy

Kelley Mack’s talent, resilience, and warmth touched audiences and colleagues alike. Her family emphasized that her storytelling left a lasting impact, and her bravery in facing illness inspired all who knew her. ClickUSANews joins the world in celebrating Kelley’s contributions to entertainment and her vibrant spirit that will live on through her work and the lives she touched.

In lieu of flowers, the family requests donations to cancer research organizations in Kelley’s memory.