Who is the oldest actor that got discovered later in life?

There are many prominent stars who didn't land their breakout role until their mid to late 30s or 40s including Harrison Ford (Star Wars), Alan Rickman (Die Hard), and Kathy Bates (Misery). Maybe one of the most notable is Christoph Waltz, who was a virtual unknown in Hollywood until landing the role as Hans Lana in Quentin Tarantino's "Inglorious Basterds" at the age of 52. He won a Best Supporting Actor Oscar for his performance.