Billy Miller’s mom says he died by suicide after battle with bipolar depression

General Hospital star Billy Miller’s mom reveals actor died by suicide after ‘valiant battle with bipolar depression’ Patricia said that “the other causes of death being told are not true,” as there were multiple speculations about Billy Miller's cause of death General Hospital star Billy Miller’s mother has revealed that the 43-year-old died by suicide. Billy died on Friday, September 15, in Austin, Texas. Billy’s mother, Patricia Miller, released the statement via Billy’s manager, who posted the message on X …