No other man had ever won the Best Actor Oscar three times.
"I really don't know how any of this happened. I have received so much more than my fair share of good fortune," Day-Lewis said upon collecting his latest prize.
"Lincoln" went into Sunday's competition with a leading 12 nominations, including one for Best Picture.
The Steven Spielberg-directed film picked up only one other award -- Best Production Design -- at the ceremony.
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