Kelley Mack—born Kelley Lynne Klebenow on July 10, 1992 in Cincinnati, Ohio—passed away on August 2, 2025, at the age of 33, after battling a rare and aggressive form of brain cancer known as central nervous system glioma or diffuse midline glioma
She leaves behind a close-knit family deeply involved in both her creative pursuits and personal journey. Her parents, Kristen and Lindsay Klebenow, were by her side at the end. Also survived by are her younger siblings—sister Kathryn and brother Parker Mack, the latter also an actor known for his work in Chasing Life and Faking It. Her grandparents, Lois and Larry Klebenow, are also among her surviving relatives.
Kelley’s family life was marked by a collaborative spirit. She co‑wrote multiple scripts with her mother Kristen, including On The Black, a baseball‑era feature inspired by her maternal grandparents’ college experiences at Ohio University. Her brother Parker shared the artistic path from childhood—together they grew up in a nurturing environment that urged creativity and emotional expression.
The family’s public tributes following her passing have painted a deeply emotional portrait of love and resilience. Her younger sister Kathryn posted a moving Instagram tribute describing Kelley as “a bright, fervent light,” and said Kelley “passed peacefully… surrounded by love.” Kathryn shared that after her death Kelley “has already come to many of her loved ones in the form of various butterflies,” which the family sees now as symbols of her presence. Kathryn added, “That tough SOB… made the leap to be reunited with God. I’m so f—ing proud of her”.
Her aunt Karen—who was present at Kelley’s bedside alongside her mother—also posted a heartfelt message, writing: “She is a beautiful soul and will be the best angel ever. I guess she wanted to go wish my dad happy birthday and Gramma and Grandpa Fish happy anniversary in person. Grandpa Fish would be 92. They are having a fun time I am sure.” Her grief was raw and tender, reflecting the depth of her loss and belief in an ongoing bond beyond this life.
Kelley’s boyfriend, Logan Lanier, is also named among her surviving loved ones, noted by multiple outlets as “her dearest boyfriend,” though without extensive public comment beyond basic acknowledgment of his relationship to her.
The family has announced two upcoming commemorative events: a remembrance gathering on August 16 in Glendale, Ohio, and a larger celebration of life in Los Angeles to include her Hollywood friends and collaborators, reflecting the two communities in which she lived and worked.
Kelley’s legacy continues not only through her performances—most notably her portrayal of Addy in Season 9 of The Walking Dead—but also through her collaborative film writing and producing, much of it alongside her mother. Throughout her illness, she documented her treatment journey candidly and with unflinching honesty, emerging as a figure of bravery and inspiration to many.
As for her family’s final reflections: they remember her as gentle, creative, brave, deeply loved, and deeply inspiring. In death as in life, they emphasize her enduring spirit—and her presence among them now in symbolic forms like butterflies that remind them of her courage and love.
This account of Kelley Mack’s passing and her family’s response is drawn from multiple sources as of early August 2025. It honors the intimate family bonds behind her public life and acknowledges the love and grief shared by those closest to her.
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