George Clooney has shared the heartbreaking news of his sister Adelia “Ada” Zeidler’s passing in a poignant statement.

“Ada was more than a sister to me; she was my hero,” the “Ocean’s 11” actor expressed to People on Saturday.

“She faced her battle with cancer with unmatched courage and humor. I’ve never encountered anyone braver,” he added. “Amal and I will feel her absence deeply.”

The publication verified that Clooney’s elder sister passed away at the age of 65 on Friday.

An obituary for the Augusta, Kentucky native notes that she was born in Los Angeles in 1960 and “passed away peacefully, surrounded by her loved ones” in a healthcare facility.

Survivors include her parents Nick and Nina Bruce Clooney, children, Nick Zeidler and Allison Zeidler Herolaga, husband Kenny, George and his wife Amal Clooney, and “several uncles, aunts, and cousins,” the obituary read.

She was preceded in death by husband Norman Zeidler, who died in 2004.

Zeidler was a former elementary art teacher and high school National Merit Scholar who loved reading, and she grew up alongside her brother in Augusta.

Her aunt Rosemary Clooney performed at her wedding to Norman in 1987, where George read scripture, according to People.

A memorial will be held for Zeidler on Monday.

A rep for Clooney did not immediately return Page Six’s request for comment.

Though she lived a private life, Zeidler was seen attending her little brother’s lavish Venice, Italy wedding to human rights attorney Amal in 2014.

Photos showed the proud sister sitting alongside the “Wolfs” actor, 64, in a boat amid the celebration. She wore a silver, beaded dress with sheer sleeves for the star-studded nuptials.

In a 2012 interview with the New York Daily News, Zeidler confessed that she was protective enough not to have her brother’s phone number.

“I wouldn’t want to have it in my phone and then lose my phone,” she said at the time, via the Columbus Dispatch. “He can phone me, and he does occasionally, but email is more convenient for both of us.”

George previously confirmed his tight bond with his sister. “My sister, I’m very close to,” he told “CBS This Morning” back in 2015.