George Clooney's Sister Adelia 'Ada' Zeidler Dies at 65 After Cancer Battle

• Adelia 'Ada' Zeidler, George Clooney's elder sister, passed away at 65 on December 19, 2025, after a courageous battle with cancer.
• George Clooney paid tribute, calling his sister his "hero" and praising her bravery and humor; he and Amal will miss her terribly.
• Ada led a private life in Kentucky, known as a talented artist, former elementary school art teacher, and active community member.
• She was a National Merit Scholar, worked as a bookkeeper, and served as grand marshal of Augusta’s Annual White Christmas Parade.
• Survived by her children Nick Zeidler and Allison Zeidler Herolaga, brother George, parents Nick and Nina Clooney, and extended family.

Why It Matters: George Clooney's beloved sister Ada Zeidler dies at 65 after cancer battle, remembered for her bravery.