George Clooney mourns his sister, Adelia Zeidler's death; calls her a 'hero'

George Clooney's older sister, Adelia “Ada” Zeidler, passed away at 65 on December 19, 2025. As per reports, she was battling cancer. The Oscar-winning actor is mourning the loss of his "hero" and praised her for the strength and resilience that she showcased.

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George Clooney confirms the news

Clooney confirmed the news through People magazine in a statement. "My sister, Ada, was my hero. She faced down cancer with courage and humor. I’ve never met anyone so brave. Amal and I will miss her terribly." As per her obituary, Zeidler took her last breath surrounded by her family and friends at St. Elizabeth Healthcare in Edgewood, Kentucky.

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Who was Adelia Zeidler?

Adelia Zeidler was born on May 2, 1960, in Los Angeles and was named after her great-grandmother. She was the daughter of journalist and television host Nick Clooney and writer Nina Bruce Warren, and was over a year older than George Clooney. She preferred to stay away from the spotlight despite being the sister of the renowned actor.

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Adelia Zeidler's family

Zeidler married retired Army Captain Norman Zeidler on March 14, 1987, in a community ceremony in Augusta, Kentucky. It was a family affair, and also featured George Clooney reading scripture and their aunt, singer Rosemary Clooney, performing a romantic song. Norman Zeidler died in October 2004 due to a heart attack.

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Zeidler is survived by her two children, Nick Zeidler and Allison Zeidler Herolaga, and her son-in-law, Kenny Herolaga. She is also survived by her parents, Nick and Nina Clooney, her brother George Clooney, and her sister-in-law Amal.