After a five-year hiatus, Day-Lewis returned to the screen to star in Paul Thomas Anderson's historical drama Phantom Thread (2017). Set in 1950s London, Day-Lewis played an obsessive dressmaker, Reynolds Woodcock, who falls in love with a waitress (Vicky Krieps). Prior to the film's release, on 20 June 2017, Day-Lewis' spokeswoman, Leslee Dart, announced that he was retiring from acting. Unable to give an exact reason for his decision, in a November 2017 interview, Day-Lewis stated: "I haven't figured it out. But it's settled on me, and it's just there... I dread to use the over-used word 'artist', but there's something of the responsibility of the artist that hung over me. I need to believe in the value of what I'm doing. The work can seem vital, irresistible, even. And if an audience believes it, that should be good enough for me. But, lately, it isn't." On Day-Lewis's retirement, Anderson stated, “I would like to hope that he just needs a break. But I don't know. It sure doesn't seem like it right now, which is a big drag for all of us.” The film and his performance were met with universal praise from critics, and Day-Lewis was again nominated for the Academy Award for Best Actor.
Widely respected among his peers, in June 2017, Michael Simkins in The Guardian writes, "In this glittering cesspit we call the acting profession, there are plenty of rival thesps who, through sheer luck or happenstance, seem to have the career we ourselves could have had if only the cards had fallen differently. But Day-Lewis is, by common consent, even in the most sourly disposed green rooms – a class apart. We shall not look upon his like again – at least for a bit. Performers of his mercurial intensity come along once in a generation."