The cause of death of Ben Affleck's mother, Chris Anne Affleck, has been revealed after the proud grandmother passed away on June 2 aged 83. News of Chris' passing broke in late July, and her obituary in The Boston Globe detailed her final wish to be there for her grandson's milestone. "Her greatest wish after her diagnosis, however, was to live to see her grandson [Atticus] graduate high school," the obituary read. She welcomed sons Ben and Casey Affleck with her husband, Timothy Affleck, yet the couple divorced when Ben was around 12 years old. "We were sitting next to our moms, and we won, and we kind of hugged our moms.