The Walking Dead is mourning actress Kelley Mack, who died at age 33. From Chicago Med to 9-1-1, meet the young actress who passed away at age 33.

Kelley Mack, the American actress known for her role as Addy on the cult series "The Walking Dead," died at the age of 33 in her hometown of Cincinnati from a central nervous system glioma. She passed away "peacefully" on Saturday evening, with her mother, Kristen, and aunt, Karen, by her side.

Her family made the announcement, sharing a message on the actress's official social media: "It is with deep sorrow that we announce the passing of our beloved Kelley . Such a bright and passionate light has passed beyond this life, to that place where, sooner or later, we will all find ourselves again." According to family members, Kelley has already made her presence felt by some of her loved ones "in the form of butterflies," a symbol of transformation and spiritual continuity. "We will miss her in a way that words cannot express. Kelley would want you to know how much she loved you," the post continues, concluding with a message from her sister Kathryn: "And I, as her sister, want you to know how brave that tough little motherfucker was, especially when she decided to take the leap to reunite with God. I am so proud of her. Damn proud."

Who was Kelley Mack, the actress who died at 33: from Addy to The Walking Dead to Chicago Med and 9-1-1

Kelley Mack gained international recognition for her role in the ninth season of "The Walking Dead" (2018–2019), where she played Addy, a resident of the Hilltop colony. She also guest-starred in episodes of the series "9-1-1" (2019) and "Chicago Med" (2022), and provided the voice of Gwen Stacy , voicing Hailee Steinfeld in the film "Spider-Man: Into the Spider-Verse" (2018) for promotional purposes, and again for a Hyundai commercial in 2024. She is very active in advertising, appearing in campaigns for Dr Pepper, Budweiser, Dairy Queen, Chick-fil-A, Ross Stores, Eli Lilly, and Rakuten (the latter alongside her mother). In film, she appeared in "Broadcast Signal Intrusion" (2021), "Delicate Arch" (2024), and the upcoming film "Universal" (2025).

Born on July 10, 1992, in Cincinnati as Kelley Lynne Klebenow, she grew up in several American states, including Ohio, Missouri, Connecticut, North Carolina, and Illinois. From an early age, she showed a strong passion for storytelling, starting by shooting videos with a small video camera she received as a gift. She began acting in commercials at a very young age and gained recognition with the short film "The Elephant Garden" (2008), which won an award at the Tribeca Film Festival. After graduating from Hinsdale Central High School (2010), she earned a degree in film from Chapman University in Los Angeles. With her mother, Kelley also wrote several screenplays, including "On the Black," a story set in the world of college baseball in the 1950s, inspired by her maternal grandparents. For the past 11 years, she had lived and worked steadily in Los Angeles. In addition to acting, Kelley Mack was a multifaceted individual with many interests: she loved tennis, hiking, pickleball, cycling, playing the piano, traveling frequently, and was a huge fan of fantasy football. Her passions also included dark chocolate, bourbon, popcorn, animals (real and stuffed), country music, and speaking with a British accent, as her family fondly recounts.

In addition to her parents Kristen and Lindsay, her sister Kathryn, her brother Parker (also an actor), her grandparents Lois and Larry, and her partner Logan, described as her "dearest fiancé," will mourn her. A public memorial service will be held on August 16th at 1:00 PM at the Glendale Lyceum in Glendale, Ohio. A second memorial service is also planned in Los Angeles for friends and colleagues. "Her vibrant spirit, creative passion, and dedication to storytelling left an indelible mark on those who knew her and on the audiences she captivated with her work," the family wrote on social media.