Mabel Lowe honored her late sister Fiona with a deeply personal Instagram carousel filled with childhood memories. The 17-year-old’s tribute brings together years of sisterly moments before ending with a poignant look at Fiona herself.For years, Mabel Painter-Lowe and her younger sister Fiona were photographed simply being sisters — playing, laughing, dressing up and growing up together. Now, one of Mabel’s latest posts has brought those childhood memories into focus, making the family’s loss feel even more personal.Fiona, the 13-year-old daughter of actor Chad Lowe and producer Kim Painter, died on Sept. 29, 2026. The Los Angeles County Medical Examiner later ruled her manner of death a suicide, adding another painful chapter to a family that had already endured enormous upheaval.

Chad and Kim announced Fiona’s death on Sept. 29, remembering their daughter as “a loving young girl who was smart, creative, and loved to dance.” Fiona was the second of their three daughters, with Mabel, 17, as her older sister and Nixie Barbara, 10, as her younger sister.The family also made clear how deeply Fiona was loved at home, saying she was “adored by her sisters” and “deeply loved by her parents.” They added, “In fact, she was the light of our lives.”The family asked for prayers and privacy as they grieved. They also shared information for the 988 Suicide & Crisis Lifeline. Days later, the wider Lowe family was also rallying around Chad and Kim. According to a source cited by PEOPLE, Chad’s brother, Rob Lowe, and Chad are especially close, and family and friends stepped in during the devastating period.