He Did Things That Were Unheard of
For his role in The Crucible (1996), Day-Lewis lived on the set, which was a colonial village, meaning no electricity or running water. He even built his own 17th-century house, using only the tools American settlers would have had available to them at the time!
When Gangs of New York was being shot (2002), he refused to wear a winter coat and eventually caught pneumonia. For his role in Lincoln (2012) he refused to break character. No if’s and’s or but’s. He essentially walked, talked, and even texted as Abe, according to his co-star Sally Field.