"I really don't know how any of this happened. I am so grateful to the academy for this beautiful honor," Day-Lewis said. "Since we got married ... my wife rebecca has lived with some very strange men, but she's been the perfect companion to all of them."
It was an historic win for Day-Lewis, who became the only actor to have won three Oscars in this category. (Jack Nicholson was the previous Oscar record holder with three wins, but one of those was for Best Supporting Actor, for 1983's "Terms of Endearment.")
You can check out the rest of the night's winners here.