Christopher Plummer accepts the supporting actor award for "Beginners" during the 84th Annual Academy Awards on Feb. 26, 2012, in Hollywood, Calif. (Credit: Getty)(CBS/AP) Updated 10:27 p.m. ETChristopher Plummer became the oldest Oscar winner in history on Sunday night, when he picked up the supporting actor prize for his role as an elderly widower who comes out as gay in "Beginners.""You're only two years older than me, darling," the 82-year-old actor he crooned to his statuette at the 84th Academy Awards ceremony. "Where have you been all my life? I have a confession to make. When I first emerged from my mother's womb, I was already...