John Bullock was preceded in death by his wife and Sandra Bullock’s mother, opera singer Helga Meyer, who died in 2000, the magazine reported.
Sandra Bullock's younger sister, Gesine Bullock-Prado, confirmed her father's death on Wednesday and wrote about his military career, ETOnline reported.
"John Wilson Bullock February 11, 1925 - September 18, 2018," she wrote. "Beloved baby brother, American #WWII #bronzestar #veteran, husband, father of 4 strong women, #grandpa, adorable scamp, handsome devil, and trickster to the end."
Sandra Bullock has not commented yet about her father's death, ETOnline reported.